suitable for motorcycle and cars with M12 mm or M14 mm spark plug 300 mm long, flexible test hose large (Ø 70 mm) easy to read scale - accuracy: +/- 3 % Clamping range: from 0 to 21 bar / 21.5 kg/cm² / 300 PSI blow off valve to probe engine valve and piston rings Caution: Shut down power of ignition coil before working with this tool!
