Ring Flange Gasket Gasket Material Graphite Insert Material 316 Stainless Steel For Pipe Size 4 in For Flange ANSI Class 150 Binder Material None Color Black Inside Diameter 4 1/2 in Minimum Operating Temperature -400 Degrees F Maximum Operating Temperature 850 Degrees F Outside Diameter 6 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