Feature:1. Each wheel has to go through 3 inspection processes from material to wheel, which can ensure a 99.9% pass rate2. The outside of the wheel is an artificial wheel shape, the color is yellow and black, which bring more threedimensional appearance3. Rubbercoated wheel, which has the characteristics of smooth running and better gripping ability4. Fourwheel drive smart car can realize left and right translation, largeangle drift, tilt 45 direction movement, square track movement and other movement modes5. This robot Mecanum wheel is compatible with building blocks and for TT motorsSpecification:Item Type: Mecanum WheelMaterial: ABS, rubberPurpose: DIY smart car accessoriesDiameter: Approx. 48mm / 1.9inCoupling Type: For TT coupling.Package List:2 x Left Wheel2 x Right WheelNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.