Flange Gasket, Ring, 1/2 in Pipe Size, 2 1/8 in Outside Dia., 27/32 in Inside Dia., Metal Detectable No, Material of Construction Aramid Fiber with Neoprene Binder, 1/8 in Thickness, -100 Degrees to 400 Degrees Temp. Range (F), Color Dark Gray, Standards ASME B16.21