... use carious kind of polymers like NBR, NR, SBR Silicone, Neoprene etc, Custom materials’ available , tell us the application, and ... : 30 to 80 shore A available. Color Black, Transparent, custom colors available MaterialsSilicone, NBR, EPDM, fluorosilicone,viton etc.ColorsBlack, ... ;3.Good entertainment center and accommodation for workers silicone products producing process: Silicone Rubber O Ring