8pcs Petrol Gas Engine Cylinder Compressor Gauge

Drain valve with full copper nickel plating, anti -oxidation and corrosion M10 adapter is suitable for motorcycles, M12 M14 M18 adapters are suitable for car. Manometer with double graduation ( 0 to 300 psi , 0- 20kg / cm 2 ) and with rubber protection to prevent scratches This compression tester can be quickly set to your bike / car , then you can get accurate readings in valves , piston rings , cylinder bores or head gaskets