... band, oil seal,water seal and rubber gaskets ect. Itemsoft silicone o -ringDescriptionWidely used in bathroom product, valve, faucet, machine, hydraumatic ... -2008, TS16949, NSF, WRAS, UL, TZW, W270, ACS, FDAMaterial100% pure silicone o-ringMaterial usage is based on the final product condition ... sizes & colors for your reference.We're hoping your inquiry. soft silicone o -ring