1. PU casters: Whether the casters work indoors or outdoors, they can meet your requirements.
2. TRP casters: They can be used in the situations that require less noise and work quietly, like working in hotels, on medical equipment, on floors, on wooden floors, on tile floors ....
3. Nylon casters and iron casters: The casters are suitable for the places where the ground is uneven or where there are iron scraps on the ground.