The STK1002 (Suction Tube Kit), machined from 6061 T-6 Billet Aluminum, is a Bulkhead Fitting comprised of a 5/8″ Suction Tube along with a ½” Fuel Return Port. This new and improved version from our previous STK-Kit allows the user to plum their FASS return line directly to their bulkhead fitting, eliminating all cutting of the filler neck, and significantly speeds up the installation process. The suction tube is fabricated of PTFE Teflon which can be easily cut to adapt to different depth fuel tanks. Properly installed, you can safely operate down to about 1/8 tank of fuel.