High quality replacement casters for a cambro mdc1418s20, mdc1520s20, mdc1520s10, mdc1520s10hd, mdc1418t30, and mdc1520t30 meal delivery carts. Listing is for a set of four (4) Service Caster series stainless steel swivel casters with 6" diameter by 2" wide thermoplastic rubber donut tread wheels with top lock brakes capable of supporting a total weight of 2,000 lbs. (500 lbs. Per caster).