AUTOMETER PRO-COMP LIQUID-FILLED MECHANICAL BRAKE PRESSURE GAUGE -- 2-5/8 in.; 0 to 2000 psi; Includes T-fitting and 3/8 in. OD x 1/8 in. -27 NPT fitting; For use only with approved brake lines; Features red pointer for quick glance monitoring, safeguard against dangerous conditions, precision movement and extreme accuracy; Recommends elbow fitting, gauge panel, mounting angle ring, and tachometer bracket.