Welcome to our store! This is a DC motor kit. There are 112 pcs/set, often needed for toys. Others include single-layer gears, double-layer gears, crown gears, main shaft gears, worm gears, pulleys, fixed brackets, plastic plates, belts, bushings, wheels, axles, switches, battery boxes, propellers, stickers, angle irons, etc. The motor shaft diameter is 2 mm, so all gears in the matched package are 2 mm. To provide spare parts support for assembling small cars and model toys. If you need to complete a complete model, you need to consider it yourself. It is practical and useful. Package included: Spindle bearing gear*8pcs Single gear *10pcs Crown gear*2pcs Double bearing gear *8pcs Pulleys*9pcs Worm, shaft sleeve*18pcs Motor, 5*8pcs wheel *24pcs Propeller*3pcs Rubber band*15pcs Other: Angle iron (4 pcs), viscose (2 pcs), green board*1 Bullet Point: This is DC motor kit. There are 112pcs/set, which are often needed by toys. Others include single-layer gears, double-layer gears, crown gears, main shaft gears, worm gears, pulleys, fixed brackets, plastic plates, belts, bushings, wheels, axles, switches, battery boxes, propellers, stickers, angle irons, etc. The motor shaft diameter is 2 mm, so all gears in the matched package are 2 mm. To provide spare parts support for assembling small cars and model toys. If you need to complete a complete model, you need to consider it yourself. It is practical and useful. Package included: Spindle bearing gear*8pcs Single gear *10pcs Crown gear*2pcs Double bearing gear *8pcs Pulleys*9pcs Worm, shaft sleeve*18pcs Motor, bracket*8pcs Wheel axle *24pcs Propeller*3pcs Rubber band*15pcs Other: Angle iron (4 pcs), viscose (2 pcs), greenboard*1 Spindle bearing gear* 8pcs Single gear *10pcs Crown gear*2pcs Double bearing gear *8pcs Pulleys*9pcs Worm, shaft sleeve*18pcs Motor, bracket*8pcs Wheel axle *24pcs Propeller*3pcs Rubber band*15pcs Other: Angle iron (4 pcs), viscose (2 pcs), green board*1 Customers are our top priority. If you find any problems with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.