Item Name: Gauge Tester Kit Set Diagnostic Compressometer Tool Compression Leakage Tester. Description Adapters for a wide number of vehiclesGauge will hold pressure s and has quick push button release valveFittings: M10, M12, M14, M18 (Male, With "O" Ring)3" Gauge has dual color scale with 0-300 PSI, 0-20 kPaIncludes 14mm and 18mm adaptersIncludes 2 rubber cones ends for quick check (no need to thread into head)Package Include:Petrol Engine Pressure Gauge Tester Kit Set Note:1.Please allow 1-2cm error due to manual measurement.