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