Rubber Seal(NBR,SBR,EPDM) 1.rubber,silicone seal 2.Nonstandard, custom-made any shape ... production(NR,BR,NBR,SBR,CR,EPDM etc) rubber seal Features:1. Materials advice: silicone and rubber (EPDM, also NBR, SI, HNBR, ... According to your drawing or samples.6. Color: black, transparent, green, red, yellow, etc7 .Hardness: 30 to 90 shore A ... outside, or as your request. (NR.NBR.SBR.EPDM etc) rubber seal