... Household appliance products and electrical productsLightingLaptop,Computer,phone etcQuality standardISO,SGS,ROHS,REACH,LFGB,FDA has approved .Each pc will be ... your request .2)All kinds of resistances,such as weether resistance,heat resistance, abrasion resistance etc.3) Hardness: 20-80 shore A. Tolerance is ... to contact me at any time . Hot sale food grade abrasion resistance O-ring Silicon seals