Products

Suppliers
Filter Gallery
2,422

Wholesale Ytterbium

Products
Ytterbium Oxide Ytterbium Oxide Powder Wholesale Ytterbium Powder Ytterbium Metal Rare Earth Sputtering Target

Sorry! No matches were found.

Excellent Cr 4+: YAG Passive Q-Switched Crystal Widely Used in 1μ M Neodymium and Ytterbium Lasers

Excellent Cr 4+: YAG Passive Q-Switched Crystal Widely Used in 1μ M Neodymium and Ytterbium Lasers

US $ 130-150 / Piece FOB
5 Pieces (MOQ)
More
Main Products: Laser Crystals, Precision Opticals, Semicoductor Materials
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shanghai Opticrystal Materials Co., Ltd.

Manufacturer/Factory

Shanghai, China Since 2024
Chat Now Send Inquiry
Suoyi High Quality Rare Earth Metal Ytterbium Fluoride Ybf3 Powder CAS 13760-80-0 with Good Price

Suoyi High Quality Rare Earth Metal Ytterbium Fluoride Ybf3 Powder CAS 13760-80-0 with Good Price

US $ 128-210 / kg FOB
1 kg (MOQ)
More
Preparation Method : Electrolysis of Fused Salts
Contact Supplier
Audited Supplier Audited Supplier Since 2022
Hebei Suoyi New Material Technology Co., Ltd.

Manufacturer/Factory,Trading Company

Hebei, China Since 2022
Chat Now Send Inquiry
High Quality Inorganic Chemical Raw Material Ytterbium Oxide CAS 1314-37-0

High Quality Inorganic Chemical Raw Material Ytterbium Oxide CAS 1314-37-0

US $ 4-13 / kg FOB
1 kg (MOQ)
More
Main Products: Organic Intermediates, Daily Chemicals, Food Additives, Chemical Catalyst, Basic Organic Chemicals, Dyes & Pigments, Inorganic Chemicals
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Shandong Boyu Chemical Co., Ltd.

Manufacturer/Factory

Shandong, China Since 2023
Chat Now Send Inquiry
Buy High Purity CAS 13760-80-0 Ybf3 Ytterbium Fluoride Powder

Buy High Purity CAS 13760-80-0 Ybf3 Ytterbium Fluoride Powder

US $ 70 / kg FOB
100 kg (MOQ)
More
Quality : Refined
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Jinan Refine Chemical Co., Ltd.

Manufacturer/Factory

Shandong, China Since 2023
Chat Now Send Inquiry
Yb Price Ytterbium Metal 99.9 for Sale

Yb Price Ytterbium Metal 99.9 for Sale

1 Kg (MOQ)
More
Main Products: Rare Earth, Rare Earth Oxides, Rare Earth Compounds, Rare Earth Metals&Alloys, Hafnium Materials, Zirconium Materials, Rare Earth Magnets, Tungsten and Molybdenum Materials, Catalysts, Polishing Powder
Contact Supplier
Audited Supplier Audited Supplier Since 2016
Ganzhou Wanfeng Advanced Materials Technology Co., Ltd.

Manufacturer/Factory,Trading Company

Jiangxi, China Since 2016
Chat Now Send Inquiry
High Power Laser Amplifier Ytterbium Doped Optical Fiber

High Power Laser Amplifier Ytterbium Doped Optical Fiber

US $ 1-10 / Meter FOB
10 Meters (MOQ)
More
Application : Communication, Sensor, Medicine, Probe
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Suzhou 3V Technology Co., Ltd.

Manufacturer/Factory

Jiangsu, China Since 2023
Chat Now Send Inquiry
Eryb Doped Fiber/Ytterbium-Erbium Co-Doped Fiber / Polarization-Maintaining Erbium-Ytterbium Codoped Fiber

Eryb Doped Fiber/Ytterbium-Erbium Co-Doped Fiber / Polarization-Maintaining Erbium-Ytterbium Codoped Fiber

US $ 0.9-10,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Optical Lens, Optical Windows, Laser Windows, Fused Silica, Optical Prism, Optical Glass, Sapphire Window, Aspheric Lens, Spheric Lens, Optical Mirror
Contact Supplier
Audited Supplier Audited Supplier Since 2021
Shanghai Rui Tai Photoelectric Technology Co., Ltd.

Manufacturer/Factory

Shanghai, China Since 2021
Chat Now Send Inquiry
Hot Sale Copper Ytterbium Master Alloy Ingot Lumps

Hot Sale Copper Ytterbium Master Alloy Ingot Lumps

1 Piece (MOQ)
More
Application : Energy Materials, Photoelectric Material
Contact Supplier
Audited Supplier Audited Supplier Since 2021
CHANGSHA EASCHEM CO., LIMITED

Manufacturer/Factory

Hunan, China Since 2021
Chat Now Send Inquiry
Vacuum Packaged Ytterbium Target 99.9% Pure

Vacuum Packaged Ytterbium Target 99.9% Pure

US $ 195-200 / Piece FOB
1 Piece (MOQ)
More
Main Products: Sputtering Targets, Powder Materials, High Purity Materials, Alloy Materials, Materials Testing
Contact Supplier
Audited Supplier Audited Supplier Since 2018
Changsha Xinkang Advanced Materials Co., Ltd.

Manufacturer/Factory

Hunan, China Since 2018
Chat Now Send Inquiry
Ytterbium (III) Fluoride Ytterbium Fluoride CAS 13760-80-0

Ytterbium (III) Fluoride Ytterbium Fluoride CAS 13760-80-0

US $ 70 / kg FOB
100 kg (MOQ)
More
Appearance : Powder
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Jinan Refine Chemical Co., Ltd.

Manufacturer/Factory

Shandong, China Since 2023
Chat Now Send Inquiry
99.95% Rare Earth Cube Ytterbium Granules Yb Pellet Evaporation Material CAS 7440-64-4

99.95% Rare Earth Cube Ytterbium Granules Yb Pellet Evaporation Material CAS 7440-64-4

US $ 17-55 / kg FOB
1 kg (MOQ)
More
Main Products: Indicator Product, Pharmaceutical Raw Material, Rubber &Plastic Additives, Water Treatment Chemicaals, Flame Retardants, Cosmetics Ingredients, Organice Intermediates &Raw Material
Contact Supplier
Audited Supplier Audited Supplier Since 2016
Lonwin Industry Group Limited

Manufacturer/Factory,Trading Company

Shanghai, China Since 2016
Chat Now Send Inquiry
High Quality Best Price Light Yellow Liquid Pharmaceutical CAS 32997-62-9 Ytterbium Hydride (Ybh3)

High Quality Best Price Light Yellow Liquid Pharmaceutical CAS 32997-62-9 Ytterbium Hydride (Ybh3)

US $ 1,000-1,200 / kg FOB
1 kg (MOQ)
Contact Supplier
Audited Supplier Audited Supplier Since 2022
Good Fortune International Trading (Tianjin) Co., Ltd

Manufacturer/Factory

Tianjin, China Since 2022
Chat Now Send Inquiry
Laser Marking Machine Laser Cutting Machine Rare Earth & Products Laser Equipment Parts Evaporation Material Target Material
1550nm Erbium Ytterbium Co-Doped Fiber Amplifier 4 Port

1550nm Erbium Ytterbium Co-Doped Fiber Amplifier 4 Port

US $ 585-1,080 / Piece FOB
1 Piece (MOQ)
More
Main Products: Xgs-Pon & CATV Wdm EDFA, Xgs-Pon & CATV Wdm Optical Receiver, Telecom Pre / Line / Booster Edfas, Hfc Optical Transmitter, CATV Edfas, FTTH Optical Receiver, Optical Switch, Sat-TV & CATV Transmitter / Receiver, Fiber Amplifier
Contact Supplier
Audited Supplier Audited Supplier Since 2015
Hangzhou Fullwell Optoelectronic Equipment Co., Ltd.

Manufacturer/Factory

Zhejiang, China Since 2015
Chat Now Send Inquiry
Polarization Maintaining Ytterbium Doped Passive Double Cladding Bare Pm Panda Optical Fiber

Polarization Maintaining Ytterbium Doped Passive Double Cladding Bare Pm Panda Optical Fiber

US $ 2 / m FOB
500 m (MOQ)
More
Connection Structure : SC
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Shanghai Fiber Cloud Communication Technology Co., Ltd

Manufacturer/Factory,Trading Company

Shanghai, China Since 2024
Chat Now Send Inquiry
Supply High Purity Ytterbium Oxide CAS 1314-37-0 in Stock

Supply High Purity Ytterbium Oxide CAS 1314-37-0 in Stock

US $ 5 / Piece FOB
1 Piece (MOQ)
More
Main Products: Isopropyl Myristate, Kojic Acid, Behenyl Trimethyl Ammonium Methyl Sulfate, Sodium Coconut Isethionate, Azelaic Acid, Magnesium Glycinate, Kojic Acid Dipalmitate, Sodium Dodecyl Benzene Sulfonate, Lpha-Arbutin, Trifluoroacetyl Tripeptide-2
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Shandong Zhishang New Materials Co., Ltd

Manufacturer/Factory

Shandong, China Since 2023
Chat Now Send Inquiry
12000W 6020 Fiber Laser Cutting Machine with Ipg 12kw Ytterbium Laser Generator

12000W 6020 Fiber Laser Cutting Machine with Ipg 12kw Ytterbium Laser Generator

US $ 12,900-19,000 / Set FOB
1 Set (MOQ)
More
Laser Classification : Solid Laser
Contact Supplier
Audited Supplier Audited Supplier Since 2022
Jinan Knoppo Automation Equipment Co., Ltd.

Manufacturer/Factory

Shandong, China Since 2022
Chat Now Send Inquiry
Customized Size Ytterbium Terbium Metal Blocks

Customized Size Ytterbium Terbium Metal Blocks

US $ 195-200 / Piece FOB
1 Piece (MOQ)
More
Main Products: Sputtering Targets, Powder Materials, High Purity Materials, Alloy Materials, Materials Testing
Contact Supplier
Audited Supplier Audited Supplier Since 2018
Changsha Xinkang Advanced Materials Co., Ltd.

Manufacturer/Factory

Hunan, China Since 2018
Chat Now Send Inquiry
Scandium Yttrium Lanthanum Cerium Praseodymium Neodymium Samarium Europium Gadolinium Terbium Dysprosium Erbium Thulium Ytterbium Lutecium Rare Earth Metal

Scandium Yttrium Lanthanum Cerium Praseodymium Neodymium Samarium Europium Gadolinium Terbium Dysprosium Erbium Thulium Ytterbium Lutecium Rare Earth Metal

US $ 500-5,000 / kg FOB
1 kg (MOQ)
Contact Supplier
Audited Supplier Audited Supplier Since 2013
Chengdu Zhijin Machinery Equipment Co., Ltd.

Manufacturer/Factory

Sichuan, China Since 2013
Chat Now Send Inquiry
Manufacturer Price Rare Earth Powder Yb2o3 Ytterbium Oxide

Manufacturer Price Rare Earth Powder Yb2o3 Ytterbium Oxide

US $ 20-40 / kg FOB
50 kg (MOQ)
More
Main Products: Bismuth Trioxide, Cobalt Oxide, Molybdenum Trioxide, Nickel Monoxide, Magnesium, Vanadium, Indium, Trimanganese Tetraoxide
Contact Supplier
Audited Supplier Audited Supplier Since 2020
Anhui Fitech Materials Co., Ltd.

Manufacturer/Factory,Trading Company

Anhui, China Since 2020
Chat Now Send Inquiry
High Purity Ytterbium Oxide Powder with CAS 1314-37-0

High Purity Ytterbium Oxide Powder with CAS 1314-37-0

US $ 5 / Piece FOB
1 Piece (MOQ)
More
Colour : White
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Shandong Zhishang New Materials Co., Ltd

Manufacturer/Factory

Shandong, China Since 2023
Chat Now Send Inquiry
Related Videos
  • What is Suoyi High Quality Rare Earth Metal Ytterbium Fluoride Ybf3 Powder CAS 13760-80-0 with Good Price
    What is Suoyi High Quality Rare Earth Metal Ytterbium Fluoride Ybf3 Powder CAS 13760-80-0 with Good Price
    Negotiable
    1 kg (MOQ)
    Contact Supplier
  • What is Yb Price Ytterbium Metal 99.9 for Sale
    What is Yb Price Ytterbium Metal 99.9 for Sale
    Negotiable
    1 Kg (MOQ)
    Contact Supplier
  • What is Eryb Doped Fiber/Ytterbium-Erbium Co-Doped Fiber / Polarization-Maintaining Erbium-Ytterbium Codoped Fiber
    What is Eryb Doped Fiber/Ytterbium-Erbium Co-Doped Fiber / Polarization-Maintaining Erbium-Ytterbium Codoped Fiber
    Negotiable
    1 Piece (MOQ)
    Contact Supplier
  • What is Polarization Maintaining Ytterbium Doped Passive Double Cladding Bare Pm Panda Optical Fiber
    What is Polarization Maintaining Ytterbium Doped Passive Double Cladding Bare Pm Panda Optical Fiber
    Negotiable
    500 m (MOQ)
    Contact Supplier
99.999% 5n Ytterbium Trioxide Ytterbium Oxide for Optical Glass with Ensure Quality and on Delivery Time CAS 1314-37-0 Yb2o3

99.999% 5n Ytterbium Trioxide Ytterbium Oxide for Optical Glass with Ensure Quality and on Delivery Time CAS 1314-37-0 Yb2o3

US $ 50-1,200 / kg FOB
5,000 kg (MOQ)
More
Main Products: Chemicals, Food Additive, Water Treatment Chemical, Detergent Chemical, Cosmetic Chemical
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Hebei Chemtics Technology Co. Ltd

Manufacturer/Factory,Trading Company

Hebei, China Since 2024
Chat Now Send Inquiry
Ytterbium Ytterbium Alloy Ytterbium Powdermetal Ytterbium Ytterbium Particle

Ytterbium Ytterbium Alloy Ytterbium Powdermetal Ytterbium Ytterbium Particle

US $ 2,000 / kg FOB
5 kg (MOQ)
More
Application : Catalyst Masses, Energy Materials, Photoelectric Material, Photorecording Material, Medicine, Astronavigation
Contact Supplier
Audited Supplier Audited Supplier Since 2016
Wuxi Taixie Metal Material Co., Ltd.

Manufacturer/Factory,Trading Company,Group Corporation

Jiangsu, China Since 2016
Chat Now Send Inquiry
High Purity 99%-99.99% Rare Earth Ytterbium Metal Yb Price

High Purity 99%-99.99% Rare Earth Ytterbium Metal Yb Price

US $ 150-230 / kg FOB
1 kg (MOQ)
More
Main Products: Rare Earth, Rare Earth Oxides, Rare Earth Compounds, Rare Earth Metals&Alloys, Hafnium Materials, Zirconium Materials, Rare Earth Magnets, Tungsten and Molybdenum Materials, Catalysts, Polishing Powder
Contact Supplier
Audited Supplier Audited Supplier Since 2016
Ganzhou Wanfeng Advanced Materials Technology Co., Ltd.

Manufacturer/Factory,Trading Company

Jiangxi, China Since 2016
Chat Now Send Inquiry
High Purity Rare Earth Ytterbium Oxide Yb2o3 Powder Price

High Purity Rare Earth Ytterbium Oxide Yb2o3 Powder Price

US $ 25-45 / kg FOB
1 kg (MOQ)
More
Grade Standard : Industrial Grade
Contact Supplier
Audited Supplier Audited Supplier Since 2016
Ganzhou Wanfeng Advanced Materials Technology Co., Ltd.

Manufacturer/Factory,Trading Company

Jiangxi, China Since 2016
Chat Now Send Inquiry

Not exactly what you want?

Post Sourcing Request

Hot Sales Nano 99.99% Ytterbium Oxide Powder CAS 1314-37-0

Hot Sales Nano 99.99% Ytterbium Oxide Powder CAS 1314-37-0

US $ 3-5 / kg FOB
1 kg (MOQ)
More
Main Products: Surfactants, Organic Intermediates and Raw Materials, Plastic Auxiliaries Processing Aids and Additive, Water Treatment Chemicals and Boicides, Electronic Chemicals, Resins Pigments and Additives for Coatings Links, Daily Care Chemicals, Food Additives and Nutraceuticals
Contact Supplier
Audited Supplier Audited Supplier Since 2011
Shanghai Sunwise Chemical Co., Ltd.

Manufacturer/Factory,Trading Company

Shanghai, China Since 2011
Chat Now Send Inquiry
High Quality Inorganic Chemical Raw Material Ytterbium Oxide CAS 1314-37-0

High Quality Inorganic Chemical Raw Material Ytterbium Oxide CAS 1314-37-0

US $ 10-30 / kg FOB
10 kg (MOQ)
More
Quality : First Class
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Shandong Richnow Chemical Co., Ltd.

Manufacturer/Factory

Shandong, China Since 2023
Chat Now Send Inquiry
Fiber Doping of 99% Ytterbium Trifluoride CAS13760-80-0

Fiber Doping of 99% Ytterbium Trifluoride CAS13760-80-0

US $ 70 / kg FOB
100 kg (MOQ)
More
Main Products: Chemical Raw Materials, Chemicals, Cosmetic Chemicals, Food Additives
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Jinan Refine Chemical Co., Ltd.

Manufacturer/Factory

Shandong, China Since 2023
Chat Now Send Inquiry
Hot Sale Magnesium Ytterbium Master Alloy Ingot Mg Yb Lumps

Hot Sale Magnesium Ytterbium Master Alloy Ingot Mg Yb Lumps

1 Piece (MOQ)
More
Application : Energy Materials, Photoelectric Material
Contact Supplier
Audited Supplier Audited Supplier Since 2021
CHANGSHA EASCHEM CO., LIMITED

Manufacturer/Factory

Hunan, China Since 2021
Chat Now Send Inquiry
Hot Sale Ytterbium Metal Powder CAS No 7440-64-4 Yb 3n 4n

Hot Sale Ytterbium Metal Powder CAS No 7440-64-4 Yb 3n 4n

1 Piece (MOQ)
More
Main Products: Rare Earth Materials
Contact Supplier
Audited Supplier Audited Supplier Since 2021
CHANGSHA EASCHEM CO., LIMITED

Manufacturer/Factory

Hunan, China Since 2021
Chat Now Send Inquiry
Ytterbium Metal Target Bars 99.9%

Ytterbium Metal Target Bars 99.9%

US $ 450-900 / KG FOB
1 KG (MOQ)
More
Product Type : Rare Earth Metal
Contact Supplier
Audited Supplier Audited Supplier Since 2016
Ganzhou Wanfeng Advanced Materials Technology Co., Ltd.

Manufacturer/Factory,Trading Company

Jiangxi, China Since 2016
Chat Now Send Inquiry
High-Purity Ytterbium Oxide 99.9-99.99% Yb2o3 Powder with Factory Price 1314-37-0

High-Purity Ytterbium Oxide 99.9-99.99% Yb2o3 Powder with Factory Price 1314-37-0

US $ 20-40 / kg FOB
1 kg (MOQ)
More
Main Products: Epoxy Resin and Hardener, Wax Raw Material, Food and Feed Additive, Detergent Raw Materials, Water Treatment Raw Materials, Cosmetic Raw Material, Fertilizer Raw Material, Coatings Paints Dyes Pigments, Rutile Sand, Titanium Dioxide
Contact Supplier
Audited Supplier Audited Supplier Since 2024
Cq Hai Chemical Co., Ltd

Manufacturer/Factory

Chongqing, China Since 2024
Chat Now Send Inquiry
Industrial Grade Yb2o3 Powder 99.99% Ytterbium Oxide

Industrial Grade Yb2o3 Powder 99.99% Ytterbium Oxide

1 Kg (MOQ)
More
Quality : First Class
Contact Supplier
Audited Supplier Audited Supplier Since 2016
Ganzhou Wanfeng Advanced Materials Technology Co., Ltd.

Manufacturer/Factory,Trading Company

Jiangxi, China Since 2016
Chat Now Send Inquiry
Dia34um Large Mode Field Triple-Clad Ytterbium-Doped and Passive Fiber Optic

Dia34um Large Mode Field Triple-Clad Ytterbium-Doped and Passive Fiber Optic

US $ 2.99-20.99 / Meter FOB
2,000 Meters (MOQ)
More
Main Products: Optical Fiber Cable Material, Optical Fiber Coating Resin, Sheath Raw Materials for Cable, PBT Polybutylene Terephthalate, Cable Water Blocking Material, Optical Fiber Coloring Ink, Cable Armoring Material, Optical Fiber Machine, Optical Fiber Cable Machine, Fiber Cable Reinforced Material
Contact Supplier
Audited Supplier Audited Supplier Since 2023
Shanghai Gengyun Industrial Co., Ltd.

Manufacturer/Factory,Trading Company

Shanghai, China Since 2023
Chat Now Send Inquiry
Ytterbium Nitride Powder CAS No 24600-77-9 Ybn 3n 4n

Ytterbium Nitride Powder CAS No 24600-77-9 Ybn 3n 4n

1 Piece (MOQ)
More
Product Type : Rare Earth Powder
Contact Supplier
Audited Supplier Audited Supplier Since 2021
CHANGSHA EASCHEM CO., LIMITED

Manufacturer/Factory

Hunan, China Since 2021
Chat Now Send Inquiry
Rare Earth Ytterbium Disc with Custom Size

Rare Earth Ytterbium Disc with Custom Size

US $ 195-200 / Piece FOB
1 Piece (MOQ)
More
Main Products: Sputtering Targets, Powder Materials, High Purity Materials, Alloy Materials, Materials Testing
Contact Supplier
Audited Supplier Audited Supplier Since 2018
Changsha Xinkang Advanced Materials Co., Ltd.

Manufacturer/Factory

Hunan, China Since 2018
Chat Now Send Inquiry
High Quality Rare Earth Ytterbium Oxide Powder for Special Glass and Alloy

High Quality Rare Earth Ytterbium Oxide Powder for Special Glass and Alloy

US $ 28.6-39.7 / kg FOB
100 kg (MOQ)
More
Product Type : Rare Earth Oxide
Contact Supplier
Audited Supplier Audited Supplier Since 2022
Hebei Suoyi New Material Technology Co., Ltd.

Manufacturer/Factory,Trading Company

Hebei, China Since 2022
Chat Now Send Inquiry
Ytterbium Oxide Ytterbium Oxide Powder Wholesale Ytterbium Powder Ytterbium Metal Rare Earth Sputtering Target
View More

Related Searches

Ytterbium

Browse by Categories

Home > Manufacturing & Processing Machinery > Laser Equipment > Laser Marking Machine
1/68
TOP

Search Filter

Categories

More Less
  • Laser Marking Machine
  • Laser Cutting Machine
  • Rare Earth & Products
  • Laser Equipment Parts
  • Evaporation Material
  • Target Material
  • Laser Engraving Machine
  • Plasma Cutting Machine
  • Laser Welding Machine
  • Tungsten

Cooling System

More Less
  • Air Cooling
  • Water Cooling

Laser Wavelength

More Less
  • Fiber Laser
  • CO2 Laser

Marking Method

More Less
  • Scanning Marking
  • Mask Pattern Marking
  • Array Type Marking

Technical Class

More Less
  • Pulse Laser
  • Continuous Wave Laser

Type

More Less
  • Optical Fiber Laser Marking Machine
  • CO2 Laser Marking Machine
  • Semiconductor Laser Marking Machine
  • YAG Laser Marking Machine

Company Type

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

Company Location

More Less
  • Hubei
  • Guangdong
  • Shandong
  • Zhejiang
  • Shanghai
  • Hebei
  • Hunan
  • Jiangxi
  • Anhui
  • Jiangsu
  • Sichuan
  • Fujian
  • Hongkong S.A.R.
  • Chongqing
  • Liaoning
  • Tianjin
  • Jilin
  • Henan
  • Inner Mongolia
  • Shaanxi
  • Beijing

Product Types

More Less
  • SecuredTrading
  • Buy Sample
Reset Done