... , Neoprene etc Silicone Rubber Breathing Mask Material NBR, NR, EPDM, FKM, SBR, Silicone, Neoprene or Custom Size According to the 2D or ... Hardness: 30 to 80 shore A available. Color Black, Transparent, custom colors available Material Temperature Range: -150F to 550F, depending on ... .Good entertainment center and accommodation for workers Silicone Rubber Breathing Mask