Features 1. This is DC motor kit. 2. 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. 3. The motor shaft diameter is 2mm, so all gears of the matched package are 2mm. 4. To provide parts support for assembling small cars and model toys. If you need to complete a complete model, you need to consider yourself. 5. It is practical and useful. 6. 7. Package included: 8. Spindle layer gear*8Pcs 9. Single gear *10Pcs 10. Crown gear*2Pcs 11. Double layer gear *8Pcs 1 2. Pulley*9Pcs 1 3. Worm, shaft sleeve*18Pcs 1 4. Motor, bracket*8Pcs 1 5. Wheel axle *24Pcs 1 6. Propeller*3Pcs 1 7. Rubber band*15Pcs 1 8. Other: 1 9. Angle iron (4 pcs), viscose (2 pcs), green board*1 Specification Package List Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.