O-ring 1. Offer a wide range of O-ring in all standard size and a lot of special size. 2. All o-ring are made according to international standard: ISO 3601, AS 568A, DIN3771, JIS B2401. The material we used is NBR, HNBR, SI, FKM(VITON), CR, EPDM, PTFE. 2, We supply products which satisfy the standard of GB, JIS, AS 568, ISODIN. Specially applied in all kinds of facilities.aterial: Nbr 30, nbr 70, nbr 90, viton 70, viton 90, epdm, silicone, hnbr, cr, nr and so on; Type: 102pcs, 225pcs, 382pcs, 386pcs, 404pcs, 407pcs, 419pcs and so on;Under our moulded rubber components, we offer rubber grommets, rubber washers, O rings, rubber gaskets, rubber bushes, rubber membrane, rubber bellows, rubber couplings, rubber bellows,