ITEM NAME:950 Pcs 0.5 Mm Watches Back Case Rubber Waterproof O-Ring Gasket Repair Tools Description Description: Waterproof,Suitable For Watch Repair And DIY Watchmaker Specifications: Material: Rubber Color: 0.5 Thick One Pack 950 Size: Thickness 0.5mm Package Included: Watch Waterproof Ring *1 Note: 1.Due To The Manual Measurement And Different Measurement Methods, Please Allow 0.05-0.07mm Deviation. 2.Please Be Reminded That Due To Lighting Effects And Monitor'S Brightness/Contrast Settings Etc, The Color Tone Of The Website'S Photo And The Actual Item Could Be Slightly Different. High quality store for you! Waterproof O-Ring Watch Back Gasket Seal Washers Gaskets Set.Waterproof O-Ring Watch Back Gasket Seal Washers Gaskets Set. Waterproof,Suitable For Watch Repair And DIY Watchmaker. Watch Waterproof Ring 1. Material: Rubber. Size: Thickness 0.5mm. We want to make sure you are happy with our item.