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Amazon.com: FINER SHOP Technic Power Functions Motor Set for Lego Technic, Upgraded Pack Crane Model, 2X M-Motors, 4X L-Motors, XL-Motos, 6X Battery Box, Receiver, Remote Control (48M717R3OFHMXQ4149X) : Toys & Games
The LEGO Power Functions Idea Book, Volume 2 by Yoshihito Isogawa: 9781593276898 | PenguinRandomHouse.com: Books
![LEGO Motors chart - comparison based on torque, speed and mechanical power. | Lego gears, Lego mindstorms nxt, Lego robot LEGO Motors chart - comparison based on torque, speed and mechanical power. | Lego gears, Lego mindstorms nxt, Lego robot](https://i.pinimg.com/originals/8c/58/8e/8c588ec59546bb7272f3cc542d87adab.jpg)