... 2.Nonstandard, custom-made 3.Meet SGS,FDS,ROHS,NSF 4.OEM/ODM OEM rubber sealing products Good factory for rubber ... seal ring features:1. Materials advice: silicone and rubber ... black, transparent, green, red, yellow, etc7 .Hardness: 30 to 90 shore A or IRHD, ... 7days For mass production mold, usually in1- 2 weeksPackage: plastic bag inside, strength carton ...