Features: Brand new and high quality. 26mm Casing Inner Diameter. The gearbox has 10 x 1.25 left hand male thread. Made of aluminum alloy + steel material, low density, high strength, strong conductivity. Lawn mower accessories universal head gearbox and complete set of accessories. Specifications: Condition: 100% Brand NewMaterial: Aluminum alloy + steel Color: Sliver Diameter: 26mm The quarity of tooth: 9 Package Included: 1 x Gear HeadNote: 1. Please allow 0~1inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.