Equipped with Birzman's patented Air-Lock valve head, designed to prevent air loss when disconnecting from the valve.Specification:Capacity: 400 psi / 27.6 bar.,Gauge: 1.6" gauge with pressure release button.,Head: Air-Lock threaded valve head.,Barrel: CNC machined aluminium.,Size: 23 x 3.6 x 4.8cm.,Weight: 183g..