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. 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. STACKING BINS ARE AVAILABLE IN BEIGE, BLACK, BLUE, GREEN, RED OR YELLOW.