Ring Flange Gasket Gasket Material Aramid For Pipe Size 3 1/2 in For Flange ANSI Class 300 Binder Material Buna-N Color Blue Inside Diameter 4 in Minimum Operating Temperature -100 Degrees F Maximum Operating Temperature 400 Degrees F Outside Diameter 6 1/2 in Thickness 1/64 in Gasket Type Ring Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Includes Mounting Hardware No X-Ray Detectable No For Fluid Type Oil Standards ASME B16.21