China Oil Seal Rubber Gasket锛宮ainly with iron plate stamping out, the shape is generally a flat gasket, there is a hole in the middle. The size of the hole is generally determined according to customer requirements. Flat washers are usually thin pieces of various shapes used to reduce friction, prevent leakage, isolate, and prevent loose or dispersed pressure. Our factory is specialized in producing all kinds of oil seals and customized high temperature oil resistant rubber gaskets. The materials of all products are :FKM, EPDM, NBR, etc.,They are found in many materials and structures. and the colors are: black, brown, etc. Welcome new and old customers to customize and buy.China Oil Seal website:http://www.hbmichu.com/oil-seal/