Vacuum Hose Adapter SP1091Z4 Hose Fitting

This is designed to thread into the wall fitting using the 1-1/2\\\" male threads on the front. The opposite side is designed to fit a 1-1/2\\\" inside diameter pool filter hose.. (1-1/2\\\" male threads actually measure about 1-7/8\\\" diameter\\\") Thread diameter : 1-7/8\\\" (1-1/2\\\" MPT) Length: 3-3/8\\\" Smooth end diameter: 1-1/2\\\" \\\"SP-1091-Z-4\\\" is molded on the side