1.Meterial,silicone 2.Hardness,Durometer 30-90 Shore A 3.Color:transparent With FDA approval food grade clear silicone o ring seals 1. Material ... , SBR, CR, IR, IIR, FPM, PVC, ABS and so on.2. Hardness: Durometer 20-90 Shore A3. Size: The same as ... 10000PCS.12. Package: Standard export packing: PVC bag, Carton, Pallet food grade clear silicone o ring seals