Spiral Wound Flange Gasket For Flange ANSI Class Not Applicable For Pipe Size Not Applicable Inside Diameter 2 1/2 in Outside Diameter 4 1/4 in Thickness 3/16 in Rim Stripe Color Gray Outside Rim Color Green Filler Material Graphite Outer Ring Material Carbon Steel Minimum Operating Temperature -320 Degrees F Maximum Operating Temperature 842 Degrees F Spiral Winding Material Stainless Steel Spiral Winding Stainless Steel Grade 316L Inner Ring Material Stainless Steel