Features 1、This gearbox middle gear is made of metal material, and with heat dissipation vane. 2、This gearbox has advantage of high speed, low noise, and wear‑resisting. 3、Drive motor gearbox for rear‑wheel drive( for six plum). 4、A good replacement part for kids electric car rear motor gear box 5、Suitable for car, remote control car and motorcycles, ATV, karting, child vehicles and other modifications. Specification Features: 1. This gearbox middle gear is made of metal material, and with heat dissipation vane. 2. This gearbox has advantage of high speed, low noise, and wear-resisting. 3. Drive motor gearbox for rear-wheel drive( for six plum). 4. A good replacement part for kids electric car rear motor gear box 5. Suitable for car, remote control car and motorcycles, ATV, karting, child vehicles and other modifications. Specification: Condition: 100% Brand New Color: White Motor Standard: RS550 Length: Approx. 18.5cm / 7.28in Width: Approx. 9.2cm / 3.62in Diameter: Approx. 3.5cm / 1.4in Optional Style: 6V550-8000rpm, 6V550-10000rpm, 6V550-12000rpm, 6V550-18000rpm, 6V550-20000rpm, 6V550-15000rpm, 6V550-14000rpm Package List: 1 x Gearbox Package List