Proform 66839 14/18mm Spark Plug White Dial Dual-Gauge Leakdown Tester

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. Sold as one kit.
Product Details:

• Leakdown Tester Kit
• Dual Gauge Model with14mm and 18mm Spark Plug Hole Adapters
• White Dial Faces Are 2-.50 Inch With Black Numbers
• 2 Foot Hose Length
• Regulator Is Included
• Sold as One Kit