Stacking Bins feature reinforced walls add strength and rigidity and wide top ledge permits stable, higher stacking. Constructed of water and corrosion proof polypropylene, they withstand freezers and autoclaves from -40°F to 250°F. Storage Bin includes a full-width hanger lip for use with louvers below. Anti-slide stop prevents shifting when stacked. Slotted label holders allow easy identification of contents., Lot of 12