Double wall construction absorbs the impact and abuse of conveyor dishwashing machines. Open design for better washing, rinsing and drying. Extenders add height to racks to accommodate taller glassware. Wave design improves water flow and air circulation for better washing action and faster drying. Includes taller dividers built into the base to better protect glassware. 4-7/16" compartment size. 5-9/16" overall height (includes extenders).