Specification Size of 4 pairs of stepped adapters:35, 40, 45 mm (1.38'', 1.57'', 1.77''); 50, 55, 60 mm (1.97'', 2.17'', 2.36''); 65, 70, 75 mm (2.56'', 2.76'', 2.95''); 80, 85, 90 mm (3.15'', 3.35'', 3.54'') The pressure gauge measures in the range of 0-6 bar(0-86 psi) standard gas inlet types:US/EU/JP STANDARD AIR INLETSPackage included 1 set * Turbo System Leakage Tester Set ( As shown in the picture) Feature The pressure leak tester helps you charge the turbo system with low pressure from the main air supply, inspecting & locating leaks in various vehicle turbo systems. 4 pairs of stepped adapters: Each adapter features 3 carefully designed steps to ensure secure fitting onto hoses of different sizes. The outer diameter of each pair is as follows: 1-3/8", 1-9/16", 1-3/4"; 1-31/32", 2-1/8", 2-3/8"; 2-1/2", 2-3/4", 3"; & 3-1/8", 3-3/8", 3-1/2", providing comprehensive coverage. Easy operation: Simply connect the adapters, attach the pressure gauge to the workshop air hose, pressu...