Maymom - Cares for Each Mom Maymom always cares about mothers' needs on the path of breastfeeding. For years, we heard mothers' request for customized, comfortable and easy- to- use tools. Maymom, a US FDA registered and inspected firm, insists on safety, efficiency and credibility of our products so that you can count on us. Maymom Flange Insert Pioneer of the Design and Innovation of Flange Insert Improved design for better suction and smooth milk flow Versatile compatibility with name brand flanges listed on product descriptions Easy to install, remove and clean Made from BPA-free silicone material US FDA and EU compliance for food contact Test reports conducted by independent labs are available online for reference Easy to attach to flanges Comes in 2 pack Quickly fix larger flanges to YOUR SIZE Size Reduction Gadget Easily and quickly reduce large-sized flange to a customized size. Personalized sizes available range from 10mm to 24mm in small increments for pumping comfort and performance. Smooth Milkflow The triangular cut on the Insert allows for smooth milkflow into the bottle. Durable Constuction The rim is specifically designed to be soft for the breast and strong enough to endure frequent pulls and washes. Safeguard Against Milk backflow The additional collar surrounding the insert ensures no milk backflow gets into the space between the insert and flange Provides a complete seal for improved suction