... resistance, anti-aging 2.silicone,rubber material 2.FDA,ROHS,SGS Certificate Factory history8 yearsFactory area3700m2CertificateSGS, ROHSMachines(20sets)Rubber mixer, Automatic slitting ... setsWorker 150Staff25QC5Main productso rings, gaskets,custom rubber parts.Material Nitrile(NBR), HNBR, EPDM,Silicone, Fluorocarbon, SBR, Neoprene(CR), ... Please feel free contact with us silicone rubber o-ring