The AndyMark 4in. Compliant Wheel Nub Bore, Durometer 35A is designed for the manipulation of objects rather than the movement of robots. These wheels are particularly effective in creating high-performance intakes and internal conveyors due to their ability to accommodate variations in the objects being driven. The green wheels, with a durometer rating of 35A, are the softest and most compliant, allowing for easy manipulation around rigid objects. They are specifically designed to work with the line of Nubs, enhancing their functionality in various applications.