Observe the step-by-step operation and see practical examples of this red 4 inch swivel caster in action. In this video, we demonstrate how the polyurethane wheel and precision ball bearing deliver smooth rolling under heavy loads, and we test its non-marking performance on finished floors. Watch real-world applications on carts, vending machines, and industrial equipment, plus a close-up look at the zinc-plated finish and mounting options. A clear, practical guide for B2B buyers evaluating caster performance.