●Durable Rubber---- Excellent replacement for the watch back cover seal gaskets. With flexibility, can perfect fit with your watch. This watch battery replacement kit is suitable for watch repair and very suitable for watchmakers. ●Keep Your Watch Water Resistant---- Rubber O-Ring watch gasket used to keep your watch water resistant. Rubber gasket set that is installed on the watch back case,can cover the gap between the watch band and movement. The watch Gaskets kit plays an important role in the waterproof of the watch. ●Installation Location---- Watch gasket rubber gasket set that is installed on the watch back case,can cover the gap between the watch band and movement. ●Application---- Suitable for watchmakers and watch repairing workers to use. Suitable for watch repair and DIY watchmaker. Simply to snap on, great water and oil resistance, good sealability, resistant, high temperature resistant, wear resistant. ●Convenient service----If you have any questions about our product, do not hesitate to contact us. We will do everything possible to meet your needs and solve your problems quickly and efficiently.