Features 1、Aluminum Alloy Material: The 127mm aluminum single omni wheel is made of aluminum alloy, which makes the omni wheel stronger, more pressure and more durable. 2、Precise Processing Technology: The omni wheel adopts a variety of high accuracy processing technologies, combined with wire cutting, laser cutting, stamping processing, etc. 3、6 Large and 6 Small Rollers: The 127mm aluminum single omni wheel is composed of 6 large rollers and 6 small rollers, which is more stable than other double omni wheels. 4、Run Smoothly: The 127mm aluminum single omni wheel can make your balance ball robot run smoothly or establish a complete power transmission system. 5、Drive Independently: Each 127mm single omni wheel can drive independently. The compact layout and rollers provide additional flexibility. Item Type: 127mm Aluminum Single Omni Wheel Valve Body Material: Aluminum Alloy Product Color: Silver Weight: Approx. 571g / 20.1oz Product Size: Diameter: Approx. 127mm / 5.0in Thickness: Approx. 28mm / 1.1in Number of Large Rollers: 6 Pieces Number Of Small Rollers: 6 Pieces Load Capacity: Approx. 20kg / 44.1lb Application: Suitable for Ball Balance Ballbot 14210 Package List 1 x 127mm Single Omni Wheel