Features: A gear motor is a specific type of electrical motor that is designed to produce high torque. Gear motors are primarily used to reduce speed in a series of gears, which in turn creates more torque. Full metal gears would ensure a longer service life, high torque and less noi se. There are five reduction gear motors of different speed and you can choose the one you need. Gear motors can be found in many different applications, and are probably used in many devices in your home. Specifications: Voltage: DC 12V Outer Diameter: 20mm / 0.78" No Load Stalling Speed(RPM) Current(mA) Torque(KG.CM) Current(A) Reduction Ratio Gear Box Length(mm) 15 25 4.9 3.3 671 20.5 30 40 8.1 0.68 382 20.5 50 -- -- -- -- -- 100 22 6.7 0.61 100 18.5 200 65 6.1 0.65 41.5 17 Package Includes: 1 x Gear Motor Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.