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 Neoprene, 1/8 in Thickness, -30 Degrees to 250 Degrees Temp. Range (F), Color White, Standards ASME B16.21, ASTM D2000 BC 607, FDA