Motor with metal gearbox for 2 - 18 Volt operation, also suitable for railway transformer (DC voltage)! For turning, lifting, lowering and all other movements where a lot of power is required. Extremely durable and durable thanks to metal gears! Set of 5.TECHNICAL SPECIFICATIONS:- Rated voltage (V) : 12- Voltage range (V) : 2 - 18- Speed (rpm) : 30 - 400- Transmission ratio : 1:100- Dimensions (mm) : 30 x 12 x 10- Weight (g) : 8- Axle diameter (mm) : 3- Axle length (mm) : 10- Mounting holes 2 x M1.6