Ring Flange Gasket Gasket Material Graphite Insert Material 316 Stainless Steel For Pipe Size 3 in For Flange ANSI Class 300 Binder Material None Color Gray Inside Diameter 3 1/2 in Minimum Operating Temperature -400 Degrees F Maximum Operating Temperature 975 Degrees F Outside Diameter 5 7/8 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