Feature●1.[Functions]: The cylinder compression tester kit is used for testing pressure on gasoline engine cylinder quickly and accurately.It is suitable for petrol engines on motorcycles, cars, trucks,and any other vehicles.●2.[Durable]: Made of high-quality materials, and treated with rust and corrosion protection, sturdy and durable enough,large acrylic dial with rubber cover is convenient to read dates more accurately.●3.[Easy to carry]: Comes with a hand-held carrying case, made of high quality PVC material, that keeps all accessories in place, provides perfect protection during transportation, and is also easier to store and increase lifespan.●4.[How to use]:Remove the valve and turn the regulator off before applying shop air, install the hose to the cylinder, calibrate the leak gauge, and connect the gauge tester to air compressor and install the other end into spark plug wells,then open air regulator valve clockwise,diagnosis is made by observing the amount of leakage indicated on the cylinder leakage gauge and listening for leakage at various points of the car system.●5.[Note]: Before doing the cylinder pressure test, please make sure that all parts are installed, do not touch any spark plug tester or any part of the test unit when igniting, shut down the engine and remove the key before each touch.Description BORNTUN cylinder compression tester kit is a portable automotive tool, used to detect many common engine failures such as piston ring wear, cylinder head cracks, valve wear, cylinder head seal burst, etc. It checks the amount of leakage in the engine cylinders and helps identify the source of the leak, once the leak tester is connected to one of the cylinders , the compressed air enters the cylinder through the integrated pressure regulator, and the diagnosis is made by observing the leakage amount displayed on the cylinder leakage gauge and listening to the leakage at each point of the vehicle system. Specifications: 1. Air Pressure: 0-7 BAR, 0-100 PSI 2. Metric Adapter: M12x1.25 3. Metric Adapter: M14x1.5 Package Includes: 1 x Engine Cylinder Leak Tester Kit