auto rubber seal ring 1.rubber,silicone seal 2.Nonstandard, custom-made any shape seal 3.Meet SGS,FDS,ROHS,NSF 4.OEM/ODM welcome ... is ok before mass productionAuto spare part rubber seal Features:1. Materials advice: silicone and rubber (EPDM, also NBR, SI, HNBR, SBR, CR ... IRHD, tolerance can be ±5 shore A, for some special products, we can reach ±3 shore A tolerance.8. High QA ...