Flange Gasket, Full Face, 2 1/2 in Pipe Size, 7 1/2 in Outside Dia., Bolt Holes 8, 2 7/8 in Inside Dia., Metal Detectable No, Material of Construction Aramid Fiber with Buna N Binder, 1/8 in Thickness, -100 Degrees to 400 Degrees Temp. Range (F), Color Blue, Standards ASME B16.21