Duolok ISSD14ME12 Tube To Male Elbow 7/8" Tube X 3/4" NPT This 316 Stainless Steel Male Elbow 3/4" NPT ISSD14ME12 Duolok has a Tube O.D. of 7/8" and a NPT of 3/4" Duolok Vs. Swagelok ® Comparison Design   SSP Duolok tube fittings are designed...