With a 1300 lb. capacity, our commercial grade caster bases are equipped with heavy duty non-locking 3-inch swivel wheels and are UL listed in the US and Canada. NEW fine floor caster bases now available with a 700 lb. weight capacity. Each base… comes with its wheels preinstalled to save time, fits inside rack, and raises total rack height only .94-inch (CBS-ERK raises the rack 3-3/4-inch). Caster base works with LF leveling feet.