The SW-Stahl 26071L is a professional compression tester designed for gasoline engines. This essential tool accurately measures engine compression, featuring a flexible hose and a pressure relief valve for convenient and precise testing. The kit includes four vital spark plug thread adapters (M10x1.0, M12x1.25, M14x1.25, M18x1.5) to ensure broad compatibility with various engine types. The clear gauge provides a pressure reading from 0 to 20 bar (0 to 300 psi), making it suitable for a wide range of diagnostic applications.