Full Face Flange Gasket Gasket Material Graphite Insert Material None For Pipe Size 1/2 in For Flange ANSI Class 150 Binder Material None Color Gray Inside Diameter 7/8 in Minimum Operating Temperature -400 Degrees F Maximum Operating Temperature 975 Degrees F Outside Diameter 3 1/2 in Thickness 1/8 in Number of Bolt Holes 4 Bolt Hole Diameter 5/8 in Gasket Type Full-Face Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Hardness Not Rated