High quality vertical racks for chest freezers or liquid nitrogen tanks are made of corrosion resistant stainless steel. Security lock devices are also available for each rack. Use the internal dimensions obtained for your chest freezer or liquid nitrogen tank (fig. 2 or fig. 3 on this page) to determine the maximum height (H) and number of racks you need for your chest freezer or liquid nitrogen tank. Vertical racks are sold with or without standard 2 in cardboard, polycarbonate or metal boxes. All racks include stainless steel locking rods. Application: For 50-Cell 1.5 mL Microtube Storage Boxes