Every Ameda Electric Breast Pump includes technology and features to make pumping comfortable and effective. Consider the piston technology in all our electric pumps… it’s designed to mimic baby’s natural nursing pattern, which helps make pumping more productive. Plus, our available Custom Breast Flanges provide alternatives to standard flange sizes to help deliver the right fit and comfort to more mothers. And the silicone diaphragm of the Ameda HygieniKit Milk Collection System provides a barrier against bacteria and viruses, and means you won't need to clean pump tubing!