Features:

• Automotive engine compression tester tuner kit
• Ideal for gasoline engines
• Checks valve and rings
• Detects excessive carbon and late timing
• Includes 2 adapters( M14x 1.25 and M18 x 1.5)  to test more vehicle
• Rubber Cover Protection 2-1/2" diameter gauge with dual-color scale (0-300 PSI & 0-21 BAR)
• Case included
• Screws into spark plug hole to test cylinder
• Compression on internal combustion gasoline engines