This 1/3 planetary gear reduction unit has practical functions, and can be well applied to compatible with 1/10 climber car. Simple structure and excellent craftsmanship make it easy to use and have excellent durability, will provide you with good service. Features -Color:As shown -Material: Aluminum alloy, copper, steel -Size:4.50X3.55X3.55cm/1.77X1.40X1.40in -Application: Compatible with 1/10 climber car -Reduction ratio: 1:3 -Derived from material, and not easy to break, , serving for a long time. -The gear reducer is with excellent performance, which is strong, and have long time for playing. -Compatible with 1/10 scale RC hobby car, very practical and sturdy, giving you a . -The smooth way will reduce the speeds of the remote controlling car and increase the climbing torque. -Professional manufacturing, high efficiency and durability to help provide the best performance. Package list: 1 x planetary gear reducer