Flange Gasket, Full Face, 3/4 in Pipe Size, 3 7/8 in Outside Dia., Bolt Holes 4, 1 1/16 in Inside Dia., Metal Detectable No, Material of Construction F1 Felt, 1/8 in Thickness, -80 Degrees to 200 Degrees Temp. Range (F), Color White, Standards ASME B16.21