... colors, its material spec can be CR,FPM,nature rubber, EPDM rubber etc, their characterisitic should be high/ low temperature-resistant ... /tooling workshop under group) MaterialSilicone or rubber (NR, SBR, NBR, EPDM, CSM, CR, HNBR, VITON, AFLAS) and more , which are comply ... special products, can reach ±3 shore AColor For rubber, usually black, for silicone, can be in any color you needMachine type50 ...