Racks for 3 inch boxes horizontal rack dims 235h x 142w x 560d with 3 apertures of approx 58mm use trays type WB613 5 racks per shelf of a New Brunswick U570 3 racks per shelf of a New Brunswick U410 4 racks per shelf of a Revco/Herafreeze 1885 5 racks per shelf of a Revco/Herafreeze 2185 6 racks per shelf of a Revco/Herafreeze 2585