Features: 1. Each product includes a unique Manufacturing Part Number label on the inner package, indicating it has been qualified, with 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. 3. Made from high-hardness steel, offering good toughness, impact resistance, improved bearing quality, and extended motor service life; highly durable. 4. Provides high temperature resistance, high wear resistance, strong load capacity, and enhanced durability, effectively protecting the gearbox and motor. 5. Lower speed results in higher power and reduced noise; higher speed results in lower power, increased noise, and faster operation. 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