Features: We provide different speed reduction motor of different speed for you to choose from. The motor's rated voltage is 3V and can be powered by 1.5~5V power source. The spindle of the motor is M4x55mm type,be carefully choose our product. Compact and practical design makes it works more stable. Large torsion of the motor will meet your different needs. Specification: Item Type:Gear Motor Spindle: M4 Spindle Length: 55mm / 2.17in Model Parameters Table Voltage (V) No load specified load Stall 12GAN20 Voltage Range Rated voltage Speed RPM(Optional) Current A Speed RPM Current A Torque KG.CM Torsion KG.CM Current A 12GAN20-30 1.5-5 3 30 0.01 25 0.02 0.26 2 1 12GAN20-100 1.5-5 3 100 0.01 80 0.02 0.11 1 0.17 12GAN20-150 1.5-5 3 150 0.01 120 0.03 0.1 0.8 0.23 12GAN20-200 1.5-5 3 200 0.03 160 0.07 0.09 0.7 0.18 12GAN20-500 1.5-5 3 500 0.01 400 0.03 0.05 0.4 0.1 12GAN20-1000 1.5-5 3 1000 0.03 700 0.08 0.02 0.3 0.3 Package List: 1 x Gear Motor1We provide different speed reduction motor of different speed for you to choose from. 2The motor's rated voltage is 3V and can be powered by 1. 5~5V power source. 3The spindle of the motor is M4x55mm type,be carefully choose our product. 4Compact and practical design makes it works more stable. ? 5Large torsion of the motor will meet your different needs.