Best Seller | GEARWRENCH 2428D Compression Tester Compression Tester, Tool Type Compression Tester, Testing Application Cylinder Compression, Material Rubber, Number of Pieces 3, Features Adapters Fit 14 and 18 mm Spark Plug Holes and Special Air-Hold Valve, Checks Cylinder Compression from 0 to 300... ... more GEARWRENCH 2428D Compression Tester Compression Tester, Tool Type Compression Tester, Testing Application Cylinder Compression, Material Rubber, Number of Pieces 3, Features Adapters Fit 14 and 18 mm Spark Plug Holes and Special Air-Hold Valve, Checks Cylinder Compression from 0 to 300... | | $37.59 go to store |