Vdo Instruments 1501011 Boost Kit Mech Us 15psi 12v Notes: U.S. / English kit. Includes 6' nylon tubing kit, fittings and 1/8-27NPT to 1/4", 3/8" & 1/2" adapter bushings. Range: 0 PSI - 15 PSI. On Dial(s): BOOST Technology: Mechanical. Sweep: Full. Voltage: 12 Volts Compatibility: U.S. Kit.