STATU16PB Features: -Has quick coupler connections for easy and fast change of gauges.-Quick Change Automatic Transmission to Engine Oil Pressure Tester.-Repair Only. Includes: -Two gauges included: 2-1/2" gauge has 0-100 PSI/0-7 bar dial, 3-1/2" gauge has 0-400 PSI/0-28 kg/cm2 dial.-With 6 ft. of Nitrile (oil proof) hose to make testing easier, plus U.S. and Metric fittingsThis allows you to check oil pressure in automatic transmissions and gasoline engines. Also test all Domestic cars and light trucks and most Imported cars and light trucks. This is more accurate than dashboard oil pressure gauges. It"s especially helpful on cars with dash indicator lights only. This set includes two gauges, a large gauge that is for all applications and a small gauge that is for more accurate readings of lower engine oil pressures. This set is included in a plastic case with instructions..