Rubber ring main type: NBR Rubber ring, Nitrile Rubber ring, NR Rubber ring, CR Rubber ring, BUNA Rubber ring, SBR Rubber ring, EPDM Rubber ring, HNBR Rubber ring, SILICONE Rubber ring, VITON Rubber ring, FLS Rubber ring. Rubber ring Characteristic: Bears the high temperature, has extremely good bears the climate, bears the ozone and bears the chemical properties, bears the petroleum. Rubber ring authentication: USA NSF/FDA; German DVG/KTW; UK WRAS. Rubber ring uses in astronautics, the automobile, the medical service, the drugs manufacture, the satellite, the valve, pump, the bathroom, the electron, the electric appliance, and so on industry. The precise Rubber ring surface is smooth, none the needle eye, none the fragments.