o ring, o rings, o-ring, o-rings main type: America o-ring kit, Europe o-ring kit, Japan o-ring kit. VITON O-rings, Silicone O-rings, Nitrile O-rings, EPDM O ring, HNBR O ring, CR O ring, BUNA O rings, NBR O rings. o ring, o rings, o-ring, o-rings Characteristic: Bears the high temperature, has extremely good bears the climate, bears the ozone and bears the chemical properties, bears the petroleum. o ring, o rings, o-ring, o-rings authentication: USA NSF/FDA; German DVG/KTW; UK WRAS. o ring, o rings, o-ring, o-rings 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 O-ring surface is smooth, none the needle eye, none the fragments, the precision achieves +/ -0.03 mm to +/ -0.08 mm . o ring, o rings, o-ring, o-rings series: AS 568 O-rings, JIS PG O-ring, GB O-ring.