O-Rings are our main products, NBR, EPDM, NR, FPM, ... to your OEM/ODM orders.O-Rings is one kind of rubber rings whose cross section is O shape. According to the ... resistance kinds. According to the shape, there are O-Rings, V-Rings, Y-Rings, and so on. And according to the material, ... HNBR, NR, EPDM, VITON, MVQ, and other kinds. O-Rings are used widely, such as sanitary, electronic and electric appliance ...