ADVANCED COMPRESSION TEST: Includes everything you need for a fast & effective compression pressure testing of petrol, gas, and fuel engine cylinders for most spark plug types on cars, trucks, motorcycles, marines, ATVs, UTVs, snowmobiles, boats, & more ALL-IN-ONE COMPRESSION TESTER KIT: 1x spring buckle gauge, 1x straight rubber cone end adapter, 1x curved rubber cone end adapter, 4x brass adapters with M10, M12, M14, M18 male fittings & O-rings, 1x 14" extension hose UNIVERSAL COMPATIBILITY: Includes multi-size adapters (straight, curved, & male fittings) for compatibility with a wide range of vehicles STURDY & ANTI-RUST: Easy-to-read instrument panel with dual units (0-300 psi, 0-21 kg/cm²). Acrylic glass gauge cover with anti-scratch coating and rubber protective cover for outstanding shock-absorption performance CASE INCLUDED: All components are protected in a custom ABS carry case for easy organization and transport