Ring Flange Gasket Gasket Material Graphite Insert Material 316 Stainless Steel For Pipe Size 2 1/2 in For Flange ANSI Class 150 Binder Material None Color Black Inside Diameter 2 7/8 in Minimum Operating Temperature -400 Degrees F Maximum Operating Temperature 850 Degrees F Outside Diameter 4 7/8 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