These racks have 12 places (3 x 4 rows) for 300 mL Biological Oxygen Demand Bottles. Made from epoxy coated steel wire, they are stackable for storage or refrigeration and autoclavable at 121° C (250° F). 32x24x18 cm (12¬Ω"x9¬º"x7¬º") high with 72mm openings. Weight 1.1 kg (2¬Ω lbs.). Stacked racks allow 180mm (7¬º") between racks.