Features: 12V 40000RPM RS550 motor gearboxes deliver powerful double drive performances for kids' ride on cars, with copper magnetic components for extended life. Features 18cm reinforced housing with 12mm bore and reversible rotation via cable adjustment, eliminating left/right differentiation for hassle free installation. Ideal for DIY enthusiasts, toy technicians, and electric vehicle modifiers seeking replacement parts for ride on toy and motorized equipment. Perfect for upgrading remote controlled cars, ATVs, or restoring children’s electric toy vehicle requiring robust 12V RS550 motor gearboxes assemblies. Optimized gear design minimizes wear for cost effective maintenance in rental fleets. Specifications: Component:Plastic, Copper, Magnet Size: Approx.5.7x3.7CM/2.24x1.46inch Quantity: 1 Pair Package Includes: 1 Pair Motor Gearboxes note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.