... manufacture silicone ring 1.rubber,silicone seal 2.Nonstandard, custom-made any shape seal 3.Meet SGS,FDS,ROHS,NSF 4.OEM/ODM Silicone rubber ... . 1.Material: SGS Approval NBR/SBR/NR/EPDM/VMQ silicone(food grade) etc2.Features: 1. Good oil,gas and ... : Regularly black,blue,silicone can according to Pantone code .10.OEM& ODM available, specification,drawing or samples, any shape silicone rubber gasket