'Flange Gasket, Ring Gasket, 4-1/8 In. Outside Dia., Bolt Holes -, 2-3/8 In. Inside Dia., 1/16 In. Thickness, Material of Construction Inorganic Fiber with Nitrile Binder, 1200 Max. Pressure (PSI), -100 To 550 Temp. Range (F), Color Gray, Metal Detectable No, Standards ANSI Sized To Fit 150 lb Flanges'