5/32" (4mm). Mounts to the rocker box and adds a visual pressure check to your suspension system. Works with all air suspension systems. Allows quick and precise adjustments without guessing. Includes a white face 1.5" 200psi air pressure gauge, one T fitting and one elbow pressure line fitting, for a 4mm (5/32") pressure line, and a steel gloss black powder coated rocker cover bracket.
