Full Face Flange Gasket Gasket Material Aramid Insert Material None For Pipe Size 18 in For Flange ANSI Class 150 Binder Material Buna-N Color Blue Inside Diameter 18 in Minimum Operating Temperature -100 Degrees F Maximum Operating Temperature 400 Degrees F Outside Diameter 25 in Thickness 1/8 in Number of Bolt Holes 16 Bolt Hole Diameter 1 1/4 in Gasket Type Full-Face Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Hardness Not Rated