Ring Flange Gasket Gasket Material SBR For Pipe Size 3 in Color Black Inside Diameter 3 1/2 in Minimum Operating Temperature -40 Degrees F Maximum Operating Temperature 140 Degrees F Outside Diameter 4 in Thickness 1/4 in Gasket Type Ring Gasket Metal Detectable Gasket No Included Fasteners Not Applicable Includes Mounting Hardware No X-Ray Detectable Not Applicable Standards ASTM FDA Approved No