OEM rubber sealing products 1.Material advice 2.Nonstandard, custom-made 3.Meet SGS, ... ,ROHS,NSF 4.OEM/ODM OEM rubber sealing products Good factory for rubber seal ring features:1. Materials advice: silicone and rubber ... IRHD, tolerance can be ±5 shore A, for some special products, we can reach ±3 shore A tolerance.8. High QA ... , strength carton outside, or as your request. OEM rubber sealing products