Advanced Compression Testing: Includes everything you need to perform fast and effective compression pressure testing on gasoline, natural gas, and oil engine cylinders for most spark plug types in cars, trucks, motorcycles, Marines, ATVs, UTVs, snowmobiles, boats, and more! Universal Compatibility: Includes multi-size adapters (straight, elbow and male) for compatibility with a wide range of vehicles. All components are protected by a custom ABS carrying case for easy organization and transport. Rugged and rust-resistant: Easy-to-read gauge panel with dual units (0-300 psi, 0-21 kg/cm²). Acrylic glass gauge cover with anti-scratch coating and protective rubberized cap for excellent shock absorption.