Moroso 89600 - Moroso Compression Tester

The Moroso Compression Tester allows you to quickly diagnoses failed or leaking valves, pistons, rings, and head gaskets. The large-diameter 3-1/2" gauge face indicates percentage of leakage rather than psi, eliminating need for math calculations. Includes 4-foot hose with quick-disconnect fitting and two zinc-plated adapters for 14mm and 18mm plug sizes.