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The unit also combines a compression tester with the popular Master Orifice so that you can check engine leakdown rate alongside a calibrated standard gauge to quickly determine whether leakage is within manufacturer limits.Complete testing tool includes:Heavy duty regulatorHeavy duty gauges18mm spark plug adapter24" pressure hoseAll connections quick disconnect18mm plug adapterHard caseInstructionsAdditional InformationTech Talk: Powerplant Compression Related Items Cable Tensionmeter (3/16" to 5/32") Air Nibbler Reversible Wire Twister Cessna Axle Nut Wrench PRICE: $262.45 PRICE: $110.25 PRICE: $85.00 Knipex Adjustable Pliers E2A Differential Compression Tester Taylor T7888A Palm Drill Reaming and Deburring Tool PRICE: $120.75 PRICE: $141.75 PRICE: $21.95