Ring Flange Gasket Gasket Material Aramid Insert Material None For Pipe Size 4 in For Flange ANSI Class 150 Binder Material Buna-N Color Blue Inside Diameter 4 1/2 in Minimum Operating Temperature -100 Degrees F Maximum Operating Temperature 400 Degrees F Outside Diameter 6 7/8 in Thickness 1/32 in Gasket Type Ring Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Hardness Not Rated Includes Mounting Hardware No X-Ray Detectable No For Fluid Type Oil