Features: This low center gear box featuring metal transmission part to reduce rollover risks by 30% and enhancing off road control stability. Aluminum construction ensures extreme durability for environments, while compatibility fits major remote control chassis brands without modifications. Ideal for competitive racers and hobbyists seeking professional crawler upgrades that balance lightweight. Technical courses confidently with optimized gear meshing that maintains 95%+ power transfer Easy efficiency during climb or rapid descents. Easy installation revolutionizes remote control customization swap gear ratios in 90 seconds using patented lock mechanisms designed for frequent terrain specific adjustments. Specifications: Component:Metal Color:Clear/Camouflage Size:Approx.52x36mm/2.05x1.42inch Package Includes: 1 Set Metal Transmission Gear Box note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.