The fully adjustable unit is vacuum referenced and utilizes a hex adjustment stud with jam nut. The unit has a 1/8 NPT gauge port, as well. The regulator is a kit, including the unit, mounting bracket, 1/8 NPT plug and 1/8 NPT to 3/16" barb. The regulator can be used with a single feed (plug second feed) or with dual feeds. Requires the purchase of port fittings separately (all three ports are -6 SAE o-ring type) and can be selected from the FAST® fuel fitting section.