This dual-gauge leakdown tester measures the condition of your head gaskets, piston rings, and valves. The gauge records incoming air pressure, and the right gauge records individual cylinder pressure - and the difference is you leakdown. Includes 14mm spark plug adapter. Product Features:Dual Gauge Model with14mm and 18mm Spark Plug Hole AdaptersWhite Dial Faces Are 2-1/2-in. with Black Numbers2 Foot Hose LengthRegulator Is Included1-inch Stud Length
