Ring Flange Gasket Gasket Material Graphite Insert Material None For Pipe Size 8 in For Flange ANSI Class 300 Binder Material None Color Gray Inside Diameter 8 5/8 in Minimum Operating Temperature -400 Degrees F Maximum Operating Temperature 975 Degrees F Outside Diameter 12 1/8 in Thickness 1/16 in Gasket Type Ring Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Hardness Not Rated Includes Mounting Hardware No X-Ray Detectable No