Feature: 1. Precision designs, can achieve maximum energy conversion. Light weight and easy to use. Easy to replace. 2. Replaceable front and rear metal differential + gearbox housing, meet your needs. 3. Easy and convenient for installation and disassemble, reliable and durable to use. 4. Practical car modification accessory, enhancing your RC car overall performance. 5. Wonderful replacement for the old or broken one, directly fitment. Specification: Condition: 100% Brand New Item Type: Differential Gear Material: Aluminum Alloy Differential Gear Material: Zinc Alloy Color: Silver Fitment: Fit for WLtoys 144001 1/14 RC Car. Package List: 1 x Gear Box Upper Cover 1 x Gear Box Lower Cover 1 x Differential Gear 1 x Accessory Bag Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.