1. actron MECHANICAL TESTERS COMPRESSION Professional compression testers detects worn rings burnt valves and blown head gaskets CP7828 Professional Compression Tester FEATURES e Measures cylinder compression to accurately diagnose engine condition e Compatible with most standard spark plug threads e Quick disconnect coupler separates hose from gauge for faster easier connections to the engine e Push button side release valve allows repeated testing without disconnecting e Includes adapters for most standard spark plug threads 10mm 12mm 14mm 14mm long reach 18mm e Repair kit includes valves and rubber O rings e Easy to read 2 1 2 professional gauge e Bourdon tube movement for accurate readings e Heavy duty rubber boot protects gauge e Standard and metric scales 0 300 Ibs psi and 0 2100 kPa e Tool pouch keeps parts organized CP7827 Compression Tester Kit FEATURES e 14mm long reach adapter included for many late model vehicles e Quick release hose disconnects from gauge for faster easier use e Full 2 1 2 easy to read face e Both U S and metric scales e 17 high pressure flexible oil and grease resistant hose e 14mm and 18mm ends fit most spark plug openings SPECIFICATIONS CP7828 Case Pack 12 5 H 5 25 W 9 D 20021467078276 CP7828 Unit 12 H 5 W 1 5 D 021467078272 CP7827 Case Pack 12 5 H 5 25 W 9 D 20021467078276 CP7827 Unit 12 H 5 W 1 5 D 021467078272