This rack can hold 20 full size sheet pans or 40 half size sheet pans. It can support up to 75 lb. per pair of slides and up to 350 lb. total. Each set of slides are spaced 3" apart, which means there will be plenty of room for your treats to cool properly. This generous spacing also gives you the ability to store foods that are not completely flat. This space-saving sheet pan rack features 5" non-marking polypropylene swivel casters. Ships unassembled.