Accessories & Parts -5 Pcs 3mm D Shaft Speed Reducer Motor Gearbox For Airplane Aircraft Model DIY Highlights Generic Brand 5 Pcs 3mm D Shaft Speed Reducer Motor Gearbox For Airplane Plane Model DIY Description: 100% brand new and of high quality Comes with mounting hole, easy to install Rotating Speed: 3V - 12RPM, 6V - 24RPM, 12V---48RPM Apply to toy models, such as planes, cars, robots or boats DIY specification: Material: Metal Size Chart: Shaft Diameter: Approx. 3mm / 0.12in Shaft Length: approx. 10mm / 0.39in Cable Length: approx. 150mm / 5.91in Hole Diameter: approx. 3.1mm / 0.12inch Package Includes: 5pcs Gear Reducer Motors Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement, there may be 1-2mm error in size.