Designed to detect a variety of common engine faults such as worn piston rings, cylinder head cracks, worn valves and blown head gaskets. It checks the amount of leakage in an engine cylinder and helps determine . Designed to check the amount of leakage in 4-stroke engines. Deal for testing trucks and car models where clearance is minimal. Fit for all local and cars and trucks. Size: 34*26*8cm Spark plug adapter: 12mm, 14mm Gauge scale: 0-100PSI Color: red + black Material: rubber + metal Package Content: 1* Cylinder Leak Tester 1* tube 2* screw 1* storage box 1* manual Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.