... size 4.O ring Medical Gaskets Silicone Gasket Ring The Details: ItemMedical Gaskets Silicone Gasket RingMaterialNBR,SBR, ... EPDM,SILICONE,VITON,NR and etcSizeCustomized/standard and nonstandardLogoDebossed,embossed and silk printingFeature--Oil ... 7.Seal Ring applicable medium: hydraulic oil, gas, water, mud, crude oil, the emulsion, water-ethylene glycol, acid ...