Our company was ISO9001 (2000) certificated and specializes in manufacturing rings, seals, gaskets, packing, sheets extrusions. The main raw materials include: Teflon, PTFE, FEP, PFA, graphite, carbon, non-asbestos, NBR, Viton, silicone, EPDM, PU, PVDF, PVC, PP, copper, aluminum, brass, ...