Full Face Flange Gasket Gasket Material Aramid Insert Material None For Pipe Size 20 in For Flange ANSI Class 300 Binder Material Buna-N Color Blue Inside Diameter 20 in Minimum Operating Temperature -100 Degrees F Maximum Operating Temperature 400 Degrees F Outside Diameter 30 1/2 in Thickness 1/16 in Number of Bolt Holes 24 Bolt Hole Diameter 1 3/8 in Gasket Type Full-Face Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Hardness Not Rated