Feature:1. Rubber watch gasket used to keep your watch water resistant. 2. Made of rubber material, flexible and wear-resistant, lasting to use. 3. Including 200pcs of the package, and 10 different types, meeting your different needs. 4. Excellent replacement for the watch back cover seal gaskets. 5. Suitable for watchmakers and watch repairing workers to use. Specification: Item Type: Watch O-Ring Condition: Brand New Material: Rubber Quantity: About 200pcs Optional Type: 0.5mm, 0.6mm Type: 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm Package List:1 Set of (200Pcs)