Sunpro CP7827 - Sunpro Compression Tester

Both kits feature a full 2.5'' diameter gauge with an easy to read face with U.S. and Metric scales, 14'' flexible, oil and grease resistant hose with 14mm and 18mm ends that fit most spark plug holes. Includes external pressure relief valve. This professional kit detects worn rings, burnt valves and blown head gaskets.