Automatic Transmission & Engine Oil Pressure Tester with Two Gages Check oil pressure in automatic transmissions and engines. Adapter provide coverage of most domestic and imported cars and light trucks including late models. Supplied with two gages calibrated as follows: Large Gage - 0-600 PSI 0-4,000kPa 0-40 BAR Small Gage - 0-50 PSI 0-3.5 BAR Large gage can be used for all applications and has a hang-up hook. Use small gage for more accurate reading of engine oil pressure where maximum oil pressure does not exceed 50 PSI (3.5 BAR). Includes 6 feet of oil proof hose and 10 assorted fittings. Supplied in durable vinyl pouch for store display and tool box storage. Full instructions provided. Now includes an adapter with two grooves. Cat. No. 34573, for use on most Asian and some American and European vehicles. Thread size is 8mm-1.00 Male x 1/8" NPT Female. NOTE: Do not use small gage to test automatic transmission pressure!