This 13pcs compression tester kit with a spark plug tester is an essential tool for any car enthusiast or mechanic. The package dimensions are 14.13x8.43x2.64 inches and the maximum PSI is 300. The kit includes both Type1 and Type2 adapters and is designed to work with engine cylinders to check for proper compression. The BETOOLL brand has a reputation for producing high-quality diagnostic service tools and this kit is no exception. It is lightweight at only 3.88 pounds and easy to use, making it a valuable addition to any toolkit. The spark plug tester allows for further diagnostics to ensure that the engine is running smoothly.