Spiral Wound Flange Gasket For Flange ANSI Class 900 1 500 For Pipe Size 1/2 in Inside Diameter 3/4 in Outside Diameter 2 1/2 in Thickness 1/4 in Rim Stripe Color Gray 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 304 Inner Ring Stainless Steel Grade Not Applicable Standards ASME B16.20 ASME/ANSI System of Measurement Inch