Caster Soft Wheel

Caster Soft Wheel
What type of caster wheel material is best suited for a tool chest in a tool and die shop?

I need something soft enough to cushion the ride but yet firm enough to resist picking up metal shavings?

I have hard plastic on mine about an inch wide. It’s not much of a cushion but the weight of the tool box helps. Plastic or even metal wheels will still pick up some metal…good luck

Handling of plastic wheels with a KUKA robot