ITEM NAME:Steel Gear N20 Mini Micro Precision DC Geared Motor D-Axis Speed Reduction Motor Product Description Mini N20 Gear Motor DC 3V-6V Slow Speed Full Metal Gearbox DIY Robot Car Specifications: 100% Brand new and high quality Voltage: 3V-6V Motor Shaft Diameter: 3mm D-type shaft Motor Shaft Length: 9mm Conductor Length: approx. 8-14cm Motor Parameters: When the power supply is 3V, Current: 0.04A, No-load Speed: 52RPM When the power supply is 6V, Current: 0.04A, No-load Speed: 104RPM Overall Size: 24mm*12mm*10mm Conversion: 1mm=0.039inch, 1inch=25.4mm Package included: 1 x Gear Motor Notice: 1.Please allow 1-3mm error due to manual measurement,Please make sure you do not mind before you.Motor Shaft Length: 9mm. We will do our best to help you to resolve your problems. We will try our best to reduce the risk of the custom duties. Conductor Length: approx.