Full Face Flange Gasket Gasket Material Graphite Insert Material None For Pipe Size 4 in For Flange ANSI Class 300 Binder Material None Color Gray Inside Diameter 4 1/2 in Minimum Operating Temperature -400 Degrees F Maximum Operating Temperature 975 Degrees F Outside Diameter 10 in Thickness 1/16 in Number of Bolt Holes 8 Bolt Hole Diameter 7/8 in Gasket Type Full-Face Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Hardness Not Rated