... , transparent, red, natural etc.3. Hardness (Shore A) :30-904. Performance : Tear resistance, Abrasion resistance, Impact strength resistance, Gas Impermeability resistance ... etc.Rubber moulding over 2000 setsWorker 150Staff25QC5Main productso rings, gaskets,custom rubber parts.Material Nitrile(NBR), HNBR, EPDM,Silicone, Fluorocarbon, SBR, Neoprene ...