Spiral Wound Flange Gasket For Flange ANSI Class 300 400 600 For Pipe Size 1/2 in Inside Diameter 3/4 in Outside Diameter 2 1/8 in Thickness 3/16 in Rim Stripe Color Gray Outside Rim Color Green Filler Material Graphite Outer Ring Material Carbon Steel Minimum Operating Temperature -400 Degrees F Maximum Operating Temperature 842 Degrees F Spiral Winding Material Stainless Steel Spiral Winding Stainless Steel Grade 316L Inner Ring Material None