Ring Flange Gasket Gasket Material PTFE Insert Material Aluminosilicate Microspheres For Pipe Size 1 in For Flange ANSI Class 150 Binder Material None Color Blue Inside Diameter 1 5/16 in Minimum Operating Temperature -450 Degrees F Maximum Operating Temperature 500 Degrees F Outside Diameter 2 5/8 in Thickness 1/8 in Gasket Type Ring Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Hardness Not Rated Includes Mounting Hardware No X-Ray Detectable No