Compression Tester Kit Used to check compression in petrol engines quickly and accurately Diagnoses problems quickly with non-threaded rubber cones Suitable for lawn mowers. motorbikes, cars, and trucks with petrol engines Easy pressure release button Comes complete with adapters for most applications Kit includes 2 rubber cone ends The 3" gauge features a dual color scale Heavy duty plastic case for easy storage and carrying Specifications Case Dimensions : 10.5" x 8.5" x 2.5" Weight : 33 oz Sizes of Threads M18x1.5 M14x1.25 M12x1.25 M10x1.0 .