... oil seal,water seal and rubber gaskets ect. Itemsoft silicone o -ringDescriptionWidely used in bathroom product, valve, faucet, machine, hydraumatic ... NSF, WRAS, UL, TZW, W270, ACS, FDAMaterial100% pure silicone o-ringMaterial usage is based on the final product condition.Packing ... Spec.Standard packing:a. plastic bag inside with barcode; b. carton outside, ...