O-ring, Rubber ring, Seal ring main type: America O-RING KIT, Europe O-RING KIT, Japan O-RING KIT. VITON O-ring, Silicone O-ring, Nitrile O-ring, EPDM O-ring, HNBR O-ring, CR O-ring, NBR Rubber ring, Nitrile Rubber ring, NR Rubber ring, CR (Neoprene) Rubber ring, SBR Rubber ring, EPDM Rubber ring, HNBR Rubber ring, SILICONE Rubber ring, VITON Rubber ring, NBR Seal ring, Nitrile Seal ring, NR Seal ring, CR (Neoprene) Seal ring, BUNA Seal ring, EPDM Seal ring, HNBR Seal ring, SILICONE Seal ring, VITON Seal ring, FLS Seal ring. O-ring, Rubber ring, Seal ring characteristic: Bears the high temperature, has extremely good bears the climate, bears the ozone and bears the chemical properties, bears the petroleum. O-ring, Rubber ring, Seal ring authentication: USA NSF/FDA;