Full Face Flange Gasket, Gasket Material Aramid, Insert Material Not Applicable, For Pipe Size 1 in, For Flange ANSI Class 150, Binder Material Buna-N, Color Green, Inside Diameter 1 5/16 in, Minimum Operating Temperature -100 Degrees F, Maximum Operating Temperature 400 Degrees F, Outside Diameter 4 1/4 in, Thickness 1/64 in, Number of Bolt Holes 4, Bolt Hole Diameter 5/8 in, Gasket Type Full-Face Gasket, Metal Detectable Gasket No, Hardness Not Rated, Includes Mounting Hardware No