Spiral Wound Flange Gasket Inside Diameter 1 1/4 in Outside Diameter 1 7/8 in Thickness 1/8 in 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 Maximum Operating Pressure 300 psi Standards None System of Measurement Inch