PMD Products Engine Cylinder Leakdown Tester Dual Gauge Diagnostic Kit for Imports Domestic Quickly diagnose internal engine problems such as bad rings, valves and leaking head gaskets. Kit come complete with adapters for most applications. Input gauge scales read 0-145 psi (10 bar, 1000 kpa), Second (measuring) gauge measures in % leakage. This leakdown gauge reads 0 to 100% leakage in 5% increments. Gauge also is colored to represent low leakage, moderate or high leakage rates. Long flex 20" 14 mm hose and smaller 9" long 14mm hose. Dual 2-1/2" gauges feature metal bezel with rugged rubber protective outer boot. Comes with pressure gauge, cylinder leakage gauge, spark plug adapter, quick connect/disconnect hose and regulator.