Designed to be used in connecting no-hub soil pipe fittings or soil pipe together. Should be tightened to 60 lb. to assure leak proof pipe joints. Cast-Iron Soil Pipe Institute certified. Requires nut driver to be installed. Made in U.S.A. No. PNH-150: 1-1/2'' I.P.S. No. PNH-22: 2'' I.P.S. No. PNH-33: 3'' I.P.S. No. PNH-44: 4'' I.P.S.