21 mm One-Piece Breastshield w/ Valve and Membrane for Medela Breast Pumps; Replace Medela 21 mm Personal Fit Breast Shield and Connector; Made by Maymom
It is well known that using the correct breastshield size is important for your pumping comfort and optimal milk supply.  It is also known that one-piece design offers easy to clean, fewer pieces to keep, and no seams to lose suction power.  Medela offers 21 mm breastshield only in the two-pieces form.  Maymom is the first company world-wide to offer 21, 25, 27 and 30 mm internal diameter one-piece design breastshields to fit Medela users' personal pumping needs.The valve/membrane in this set are interchangeable with your existing Medela parts. Maymom has 4 years experience in making breast pump parts. 100% compatibility is guaranteed or your money back!  Disclaimer: Medela is a registered trademark of Medela, Switzerland.  Maymom is not affiliated with Medela nor does Medela endorse the product.