rubber silicone o ring 1.water, oil resistance, anti-aging 2.silicone,rubber material ... .Rubber Mouldingover 2000 setsWorker 150Staff25QC5Main productso rings, gaskets,custom rubber parts.Material Nitrile(NBR), HNBR, EPDM,Silicone, Fluorocarbon, SBR, Neoprene(CR ... daysMore information Please feel free contact with us silicone rubber o-ring