Designed specifically for testing compression by motorcycle and small engines. Features a specially designed compression gauge and hose assembly, plus three different size hose adapters. Compression tester and hose lengths are designed for optimal viewing from the side of the engine. Works with most popular motorcycle and small engine plug sizes (16mm, 18mm, 21mm). Corrosion-resistant nickel-plated finish. 270mm (10-5/8”) flex hose gauge assembly with quick coupler. 70mm (2-3/4”) gauge features chrome bezel and rugged protective outer boot.