Features:
OOTDTY  
The tester is made of durable and steel materials, which can be used for a long for time and is not easily deformed after repeated use.
Checking compression on petrol engine quickly and accurately.
Easy pressure release button on side of tester. Manual pressure release for maintaining for peak readings.
Professional-grade threaded adapters for leak-proof seals. Extended hoses for hard-to-reach applications.
Large, easy-to-read 6.9m/2.71inch diameter gauge.

Specifications:
Material:Metal+Plastic
Diameter: Approx.6.9m/2.71inch

Package Includes:
1x Engine Compression Tester Gauge

Note:
1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.
Thanks for your understandings.