The AndyMark 4in. Compliant Wheel 1/2 Hex, Durometer 60A is engineered for the manipulation of rigid objects rather than robot mobility. This wheel is part of a system that, when aligned on a driven hex axle, forms an efficient roller capable of handling variations in object shapes. The black wheel, with a durometer of 60A, is firmer than its counterparts, allowing it to support higher rotational speeds. It is constructed from TPU and polycarbonate materials, ensuring durability and performance in high-speed applications.