(Universal hubs). Comprehensive round (omni wheels) can be used in robots cart wheels of various colors omnidirectional wheel, and other applications that require special features make this wheel disc station, the robot wheels and so on. It comes with an NXT compatible hub Arduino motor shaft omnidirectional wheel hub Tong machinery _ _ n omnidirectional wheel of various materials provided by Ning County is Tong Machinery Plastic Co., Ltd. "Fuk Loi wheel, omni-directional wheel, universal ball, wheel and other two-way" preferred Ning County is Tong Machinery Plastic Co., Ltd. (www.dzztjx.com), the company is located: Galaxy Ningjin County Economic Development Zone, over the years, is Tong machinery to provide customers with the best quality service, contact: song manager. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Positive Tong mechanical expect to be your long-term partner!