Killer Custom, V-Rod air ride gauge kit. Black face. 6mm1 4" (6mm). 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 6mm (1 4") pressure line; and a steel gloss black powder coated rocker cover bracket.