The Baby Brezza Bottle Washer Pro Breast Pump Rack is designed to powerfully wash ALL breast pump parts from any brand, including flanges, shields, collection cups, valves/membranes and storage bottles. It fits pump parts from all types of breast pumps, including wearable pumps, to help you simplify your pumping and feeding routine. Its two powerful spray arms with 21 high pressure spray jets ensure thorough cleaning inside and out. This full replacement rack system includes the top rack, bottom rack, connecting tubes, and a basket for valves/membranes. Use this pump rack in place of the Bottle Washer Pro's existing rack system to automatically wash, sterilize and dry pump parts. The bottom rack holds up to 4 flanges, shields, collection cups and storage bottles while the top rack fits up to 7 larger valves and membranes and has a basket for smaller valves/membranes.