Duolok ISSD16MC12 Tube To Male Fitting 1" Tube X 3/4" NPT This 316 Stainless Steel Male Connector 3/4" NPT D16MC12 Duolok has a Tube O.D. of 1" with a NPT male pipe size of 3/4" Duolok ISSD16MC12 Features: 1" NPT Tube Fitting 3/4-14 Male Pipe...