Products

Suppliers
Filter Gallery
4,961

Nano Oil Additive

Products
Polymer Sealing Additive Polymer Plugging Additive Nano Silica Diesel Engine Oil Drilling Fluid Shale Shaker

Sorry! No matches were found.

Oil Based Nano-Polymer Sealing Additive for Drilling Fluid

Oil Based Nano-Polymer Sealing Additive for Drilling Fluid

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Classification : Specific Reagents
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Application : Industry
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Selling Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

Selling Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Application : Industry
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
New Type Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

New Type Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Factory Direct Sales Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

Factory Direct Sales Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Classification : Specific Reagents
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Content : Standard
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Nano-Polymer Sealing Additive for Oil Base Mud Plugging

Nano-Polymer Sealing Additive for Oil Base Mud Plugging

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Content : Standard
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Oxide Chemical Reagent Synthetic Lubricant Organic Intermediate Chemical Auxiliary Inorganic Pigment
Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Price Optimization Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

Price Optimization Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Classification : Specific Reagents
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Oil Based Nano-Polymer Sealing Additive for Obm

Oil Based Nano-Polymer Sealing Additive for Obm

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Application : Industry
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Drum, IBC-Tank, ISO-Tank Fuel Additives Chorus Nano Engine Oil Additive

Drum, IBC-Tank, ISO-Tank Fuel Additives Chorus Nano Engine Oil Additive

US $ 3,000-4,000 / Ton FOB
1 Ton (MOQ)
More
Main Products: Lubricant Additive, Oil Additive, Extreme Pressure Additive, Polymer, Lubricant Additive Component, Lubricant Additive Package, Metal Working Fluid, Viscosity Index Improver, Friction Modifier, Synthetic Ester
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Zhengzhou Chorus Lubricant Additive Co.,Ltd

Henan, China Since 2023
Chat Now Send Inquiry
Made in China Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

Made in China Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Application : Industry
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Custom Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

Custom Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Obm Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Content : Standard
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Related Videos
  • What is Drum, IBC-Tank, ISO-Tank Fuel Additives Chorus Nano Engine Oil Additive
    What is Drum, IBC-Tank, ISO-Tank Fuel Additives Chorus Nano Engine Oil Additive
    Negotiable
    1 Ton (MOQ)
    Contact Supplier
  • What is Anti Fingerprint Additive for Metal Anti-Fingerprint Coatng, Metal Antifouling Coating, Nano-Coatings & Treatments, Water and Oil Repellent
    What is Anti Fingerprint Additive for Metal Anti-Fingerprint Coatng, Metal Antifouling Coating, Nano-Coatings & Treatments, Water and Oil Repellent
    Negotiable
    1 kg (MOQ)
    Contact Supplier
  • What is High Cost Performance Multi-Functional Nano-Sio2 Plugging Additive for Drilling Fluid Ns-1
    What is High Cost Performance Multi-Functional Nano-Sio2 Plugging Additive for Drilling Fluid Ns-1
    Negotiable
    10 Tons (MOQ)
    Contact Supplier
  • What is High Performance Multi-Functional Np-1 Nano-Polyester Additive for Drilling Fluid
    What is High Performance Multi-Functional Np-1 Nano-Polyester Additive for Drilling Fluid
    Negotiable
    10 Tons (MOQ)
    Contact Supplier
Factory Direct Sales Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

Factory Direct Sales Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
New Type Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

New Type Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Classification : Specific Reagents
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Custom Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

Custom Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Classification : Specific Reagents
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry

Not exactly what you want?

Post Sourcing Request

Made in China Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

Made in China Oil Based Nano-Polymer Sealing Additive for Obm Omp-1

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

Omp-1 Oil Based Nano-Polymer Sealing Additive for Drilling Fluid Good Reputation

US $ 3,500-3,600 / Ton FOB
10,000 Tons (MOQ)
More
Content : Standard
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Anti Fingerprint Additive for Metal Anti-Fingerprint Coatng, Metal Antifouling Coating, Nano-Coatings & Treatments, Water and Oil Repellent

Anti Fingerprint Additive for Metal Anti-Fingerprint Coatng, Metal Antifouling Coating, Nano-Coatings & Treatments, Water and Oil Repellent

1 kg (MOQ)
More
Main Products: UV Resin, UV Curing Oligomer, Monomer, Photoinitiator, Functional Additive, Epoxy Acrylate, Polyurethane Acrylate, Polyester Acrylate, Defoamer, Leveling Agent
Contact Supplier
Audited Supplier Audited Supplier Since 2022
Guangdong Lencolo New Material Co., Ltd.

Manufacturer/Factory,Trading Company

Guangdong, China Since 2022
Chat Now Send Inquiry
Nano Scale Zinc Oxide Powder Chemical Additives

Nano Scale Zinc Oxide Powder Chemical Additives

US $ 2,500-3,200 / Ton FOB
1 Ton (MOQ)
More
Usage : Oil Drilling Auxiliary Agent, Water Treatment Chemicals, Rubber Auxiliary Agents, Plastic Auxiliary Agents, Coating Auxiliary Agents, Textile Auxiliary Agents, Paper Chemicals, Surfactants
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shenzhen Mingpai Technology Co., Ltd.

Manufacturer/Factory

Fujian, China Since 2024
Chat Now Send Inquiry
High Purity Nano Scale Zinc Oxide Powder Additives

High Purity Nano Scale Zinc Oxide Powder Additives

US $ 2,500-3,200 / Ton FOB
1 Ton (MOQ)
More
Main Products: industrial chemicals
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shenzhen Mingpai Technology Co., Ltd.

Manufacturer/Factory

Fujian, China Since 2024
Chat Now Send Inquiry
Essential Oil Nano Emulsifier for Enhanced Food Preservation and Quality

Essential Oil Nano Emulsifier for Enhanced Food Preservation and Quality

US $ 0.99-7 / kg FOB
1 kg (MOQ)
More
Property : Non-ionic Emulsifiers
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Henan Honest Food Co., Ltd.

Manufacturer/Factory

Henan, China Since 2024
Chat Now Send Inquiry
China Manufacturer Nano-Polymer Plugging Additive for Wbm Np-1

China Manufacturer Nano-Polymer Plugging Additive for Wbm Np-1

US $ 2,750-2,850 / Ton FOB
10 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
High Cost Performance Multi-Functional Nano-Sio2 Plugging Additive for Drilling Fluid Ns-1

High Cost Performance Multi-Functional Nano-Sio2 Plugging Additive for Drilling Fluid Ns-1

US $ 1,380-1,450 / Ton FOB
10 Tons (MOQ)
More
Application : Industry
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
High Quality Drilling Fluid Additive Np-1 Nano-Polyester

High Quality Drilling Fluid Additive Np-1 Nano-Polyester

US $ 2,750-2,850 / Ton FOB
10 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
High Performance Multi-Functional Np-1 Nano-Polyester Additive for Drilling Fluid

High Performance Multi-Functional Np-1 Nano-Polyester Additive for Drilling Fluid

US $ 2,500-2,560 / Ton FOB
10 Tons (MOQ)
More
Classification : Specific Reagents
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
High Quality Multi-Functional Np-1 Nano-Polyester Micro-Nano Plugging Additive for Drilling Fluid

High Quality Multi-Functional Np-1 Nano-Polyester Micro-Nano Plugging Additive for Drilling Fluid

US $ 2,500-2,560 / Ton FOB
10 Tons (MOQ)
More
Main Products: DSP-1 Copolymer Filtration Reducer, DSP-2 Copolymer Filtration Reducer
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Sell Well Ns-1 Nano-Sio2 for Wbm Drilling Fluid Additive

Sell Well Ns-1 Nano-Sio2 for Wbm Drilling Fluid Additive

US $ 1,380-1,450 / Ton FOB
10 Tons (MOQ)
More
Application : Industry
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shandong Deshunyuan Petroleum Sci&Tech Co., Ltd.

Manufacturer/Factory,Trading Company

Shandong, China Since 2024
Chat Now Send Inquiry
Polymer Sealing Additive Polymer Plugging Additive Nano Silica Diesel Engine Oil Drilling Fluid Shale Shaker
View More

Related Searches

Chemical Zinc Oxide Titanium Dioxide Food Additives Lubricant Additive Tyre Carbon Black Lubricant Additive Lubricant Oil Additive Wholesale Nano Oil Additive

Browse by Categories

Home > Chemicals > Inorganic Chemicals > Oxide
1/138
TOP

Search Filter

Categories

More Less
  • Oxide
  • Chemical Reagent
  • Synthetic Lubricant
  • Organic Intermediate
  • Chemical Auxiliary
  • Inorganic Pigment
  • Carbonate
  • Building Coating
  • Petroleum Additive
  • Fuel Additives

Application

More Less
  • Industry
  • Environmental Protection
  • Agriculture
  • Scientific Research
  • Health

Classification

More Less
  • Specific Reagents
  • High Purity Material
  • Organic Analytical Reagents

Content

More Less
  • Standard
  • Comparison

Specific Usage

More Less
  • Technical Grade
  • For Electrophoresis Use
  • For Synthesis
  • Super Special Grade
  • For Microscopic Purpose
  • For Biological Purpose
  • For Refractive Index
  • For Scintillation
  • Pro Analysis
  • For Electron Microscopy
  • For Microbiological
  • For Tissue Medium Purpose
  • Pratical Use
  • For Lens Blooming

Usage

More Less
  • Analytical Reagents
  • Laboratory Reagents
  • Teaching Reagents
  • Diagnostic Reagents

Company Type

More Less
  • Trading Company
  • Manufacturer/Factory
  • Group Corporation
  • Other

Company Location

More Less
  • Shandong
  • Hebei
  • Jiangsu
  • Henan
  • Shanghai
  • Guangdong
  • Jiangxi
  • Anhui
  • Tianjin
  • Zhejiang
  • Hubei
  • Beijing
  • Liaoning
  • Hunan
  • Fujian
  • Shaanxi
  • Inner Mongolia
  • Heilongjiang
  • Gansu
  • Chongqing
  • Ningxia
  • Hainan
  • Shanxi
Reset Done