... ,Material:PTFE 2 ,Factory direct sales,good price. 3.PTFE Seals gasket ,Can be customized according to customers' require PTFE Sealing ... Rings PTFE Gasket has the best corrosion-resistance and dielectricity. Lead insulating sleeve, corrosion-resistant Teflon gaskets, and corrosion-resistant insulating ... in which a non-metallic gasket can be used. PTFE SEALS