Engine Cylinder Compression TesterTesting Gauge Kit Automotive Diagnostic Tools Product DescriptionHighlightsCheck valves and rings, inspect for carbon buildup and late timing.Adapters for a wide number of vehicles (spark plug types/depths)Kit includes 2 rubber cones ends for quick check (no need to thread into head)3″ Gauge has dual color scale with 0-300 PSI, 0-20 kPaGauge will hold pressure values and has quick push button release valveFittings: M10, M12, M14, M18 (Male, With “O” Ring)Includes 14mm and 18mm spark plug adaptersWhat You Will get1Pc rubber-protected gauge1Pc extension hose2Pcs spark plug adapter4Pcs straight and angled fittings1Pc use manualA blow mold caseA Closer LookAbout the GaugeDiam: 3″Dual scale: 0-300 PSI, 0-20 kPaBetter Air Sealing: Rubber protective cover & authentic copper check valveAbout Fittings4 Fittings Covers Most vehiclesM10*1.00MM; M12*1.25MM; M14*1.25MM; M18*1.50MMAbout Spark Plug AdaptersSize: 14mm&18mmIncludes 2 rubber cones ends for quick check (no need to thread into head)About Long Extension Hose1/2″ diameter x 14″ extension hose ing Analytics