Ring Flange Gasket, Gasket Material Graphite, Insert Material 316 Stainless Steel, For Pipe Size 3 in, For Flange ANSI Class 150, 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 3/8 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