"Use with hose and nozzle to allow more freedom of movement. Prevents hose from kinking full 360 rotation extends life of hoses. 1in. inlet. U.S.A. Both joints rotate a complete 360 degrees for maximum flexibility and customer convenience Dual-plane rotation prevents hose from kinking and extends hose life 1in. inlet and outlet for heavy-duty commercial use Sand cast aluminum and brass construction delivers longer life and prevents seizing in the swivel Large Flow-thru design, lowering resistance and allowing for smoother fueling Assembled with stainless steel bearings for smooth operation and longer life Dual oversized O-rings prevent leaking, even in tough applications"