Moroso Compression Tester

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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.