Product Description Diesel Compression Tester - Adapters Sold Separately Tests cylinder pressure on Diesel cars and trucks. Handy deflator for releasing air and automatic re-setting of gauge for repeat testing. Swivel end quick coupler for easy connection to all our adapters. All adapters are sold separately. Wire reinforced hydraulic house is 16 1/2" long. Adapters from most other manufacturers are interchangeable w/ our tester. 2 1/2" easy to read red and black gauge records pressure from 0-1000 PSI and 0-70 bar. Made in the U.S.A.