Full Face Flange Gasket Gasket Material Buna-N Insert Material None For Pipe Size 3 in For Flange ANSI Class 300 Binder Material None Color Black Inside Diameter 3 1/2 in Minimum Operating Temperature -30 Degrees F Maximum Operating Temperature 250 Degrees F Outside Diameter 8 1/4 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 Shore 60A