This differential kit is designed for WLtoys A949 A959 A969 A979 K929 A959-B A969-B A979-B K929-B Cars. Made of high-quality metal, it Features high driving efficiency, compact structure, high load-bearing capacity, and is convenient to assemble. It is the best choice of RC hobbyists to improve the car's performance. Features: This differential kit comes with 2 differential carriers, 1 drive shaft, 4 steering hubs, 2 differential gears, other gears, etc. This differential kit is designed for WLtoys A949 A959 A969 A979 K929 A959-B A969-B A979-B K929-B Cars. Made of high-quality metal to allow this kit durable in use. Make the left and right drive wheels can be rotated at different speeds. High wear-resistant capacity and ensure a stable and safe driving. Any problem, please contact our store without hesitation. Honor to serve you. Specifications: Item name: Differential Kit Main Material: Metal Color: Black&Blue Types (optional): includesa 38T gear&a 17T gear/a 42T gear&a 27T gear Suitable for: WLtoys A949 A959 A969 A979 K929 A959-B A969-B A979-B K929-B Cars Package Information: Package size: 11 * 9.5 *3cm Package weight: Type1: 89g; Type2: 100g Polybag package. Note: * There could be a few deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Packing List: 2 * Differential Carries 1 * Drive Shaft 4 * Steering Hub 2 * Differential Gears 1 * 38T Gear 1 * 17T Gear 1 * Installation Parts Kit