Features: Can be quickly set to your motor / car, get accurate readings in valves, piston rings, cylinder bores or head gaskets. Drain valve with full copper nickel plating, anti-oxidation and corrosion. With rubber protection to prevent scratches. Come with 2 rubber cones that don’t need to be threaded into the head, can test the compression on almost any engine. Specification: Material: Alloy Steel & Plastics & Rubber, Dimensions: (11.8 x 7.9 x 2)” / ( 30x 20 x 5) cm (L x W x H) Weight: 1.98 lb / 0.9 kg, Function: Compression gauge test set for engine cylinders diagnostic tester adapters for a wide number of vehicles: spark plug types/depths. Package includes: 1 x Cylinder Pressure Gauge, 1 x Long Pipe, 2 x Metal Pipes, 4 x