Torque Solution 3/8" SAE Locking EFI Union Fitting with 1/8" NPT PortTorque Solution Adapter Fittings are made from 6061 Billet Aluminum and are compatible with a wide variety of fuels and fluids. This adapter is perfect if you want to add a 1 8" NPT port to your vehicles hard lines to add either a fuel pressure gauge or sensor. Features: 6061 Billet Aluminum Black Anodized 3 8" (10mm) 1 8" NPT Port O ring Seal E85 Compatible Limited Lifetime Warranty