BOSCH (FIX 7828 Professional Compression Tester
Measures cylinder compression to accurately diagnose engine condition
Compatible with most standard spark plug threads
Quick disconnect coupler separates hose from gauge for faster, easier connections to the engine
Push button side release valve allows repeated testing without disconnecting
Includes adapters for most standard spark plug threads 10mm, 12mm, 14mm, 4mm long reach, 18mm