Heavy-Duty Petrol Engine Compression Tester. Why Choose Our Compression Tester?. Adapters for a wide number of vehicles accommodating various spark plug types and depths. Manufacturer Part Number: Compression Tester Kit Unit Quantity: 0.8 Vehicle Type: Motorcycle,Passenger Vehicle,Automotive Accessories: Adaptor Hose,Rubber Cone Ends,Thread Adapters,Adapter Hose.