The CAL-VAN 816 Engine Compression Tester is a high-quality diagnostic tool made in the USA by Cal-Van Tools. With a maximum PSI of 300, this compression tester is designed to accurately measure the compression of your engine. Perfect for mechanics and car enthusiasts looking to ensure optimal engine performance, this reliable tool is compact and easy to use for efficient troubleshooting and maintenance. Whether you are professional mechanic or a DIY enthusiast, the CAL-VAN 816 Engine Compression Tester is a must-have for your automotive tool collection.