The AndyMark 4in. Compliant Wheel 5mm Hex, 5", Durometer 60A is designed for manipulating objects rather than moving robots. It is part of a system that uses multiple wheels on a driven hex axle to create an efficient roller, capable of handling variations in the objects being moved. This wheel is particularly firm, with a durometer rating of 60A, making it suitable for applications requiring higher RPMs. The wheel is constructed from TPU and polycarbonate materials, ensuring durability and performance in high-speed environments.