Q81C Motorcycle Valve Spring Improves the Working Efficiency of Professional Mechanics OOTDTY Features: Solid Material, Quality, Excellent and Professional Workmanship. Compressor valve spring installs and removes valves for small engines, motorcycles, four-wheeled motorcycles, etc. Designed specifically for small motorcycle engine applications to help your motorcycle run well. A good and excellent repair tool, it can deal with valve problems effectively. Manufactured to meet or exceed standard specification, with easy and simple installation. Specification: Material: Alloy Length: 30cm/11.81in Operating Range: 60mm-35mm=25mm Package Includes: 1 x Spring Valve Clamping PliersNote: Please allow 0-3mm errors due to manual measurement, please make sure you do not mind before ordering.