... , Nitrile(NBR), Neoprene(CR), Silicon, Viton, SBR, Natual rubber and various other basic raw materials.Hardness: From 35 to 85 Share ... to +260 Degrees Centigrade (up to 300C for short periods).Various color are available,like black,red,white,blue.etc.Grade ... as per your sample or drawings,do believe that we can supply competitive price &quality with best service. rubber part of machine