Hex Bushing, Pipe Size 4 x 1 1/4 In, Threaded Connection, Material of Construction Black Iron, Class 150, WOG 300 At -20 to 150 Deg F PSI, Standards UL: FM Approved: ASME B16.3, Compliance Certified For Use in Potable Water Applications in CA and VT Black and Galvanized Malleable Iron Fittings Class 150Black fittings are interchangeable with black cast-iron or steel. NPT connections. For low-pressure plumbing applications including air, water, natural gas, and steam.Max. pressure: 300 psi WOG at 150 F; 150 psi saturated steamAnvil Domestic BlackUL Listed; FM Approved; meet ASME B16.3.