Kit includes heavy-duty diesel compression tester coupler for easy connection to all adapters. Tests cylinder pressure on Diesel cars & trucks. 3" easy to read red and black gauge records pressure from 0-1,000 PSI and 0-70 bar. Handy deflator for releasing air and automatic re-setting of gauge for repeat testing. Swivel end quickulic hose is 16-1/2" long. Adapters include 7/16-20, M12x1.25, M10x1, M10x1.25, M12x1.25, M24x1.5, M24x2 and more.