Gasket,Spiral-wound,316 SS windingsflexible Graphite filled with carbon steel outer ring,150#, RF,B16.20,4.Smm Thick Type: Spiral Wound Gasket，Ring type joint gasket, Flat gasket, , Insulation gasket Standard: ASME B16.20,B16.21，ASME B16.5/B16.47 Material: Graphite, PTFE/Teflon,CS,SS304,SS316,monel alloy, soft iron,G10,G11... Specification: 1/2”-48” (We also can produce as per client drawing for special size.) Class rating: CL150-CL2500,3000PSI,5000PSI,10000PSI,PN2.5,PN6,PN10,PN25,PN40,PN63,PN100 Surface treatment: Oiled coated to prevent rust, galvanized Marking: As per standard & customer's requirements Packing: By carton or plywood box Please visit our website for more information: https://www.hxpipeline.com