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Description: -color:as pictures shown -Material:metal+plastic -37mm Gear Motor Mounting Hole Size: M3 -Wheel Diameter:65mm M3*11 Screw -Intended to be parts for use with science projects, science fairs, etc. and are provided with minimal to no operating instructions -Designed to work with many power sources, including batteries,solar cells and messager -it comes including 1*Coupling Nut 1*Metal Fixed frame,1* Plastic Wheel,8*M3 Screw and 8*M3 Nut Pakcing Including: 1*FLORMOON Smart Robot Car Kit Fixed frame Coupling Nut Plastic Wheel DIY Toys Science Set for 37mm Gear DC Motor