Features: 1. Every product has a unique Manufacturing Part Number label on the inner package that verifies qualification, including Part Number, Model Number, and inspection date information. 2. If you have any questions about the item, please provide the Manufacturing Part Number for verification; your satisfaction is guaranteed. 3. Made from high-hardness steel with good toughness, providing impact resistance and improved durability, bearing quality, and motor service life. 4. High temperature and wear resistance with strong load capacity, ensuring sturdiness and effective protection of the gearbox and motor. 5. Delivers higher torque at lower speeds with reduced noise; higher RPM results in increased speed but reduced power and higher noise levels. Specifications: Material: Metal Color: Silver Size: 8.6 x 3.8 cm (3.39 x 1.50 inches) (L x W) Weight: 458 g Package Includes: 2 x Cable 4 x Gear 2 x Children Electric Car Motor