One-Piece Breastshield w/ Valve, Membrane for Medela Breast Pumps (Pump in Style, Lactina, Symphony), Choices of 21, 24, 25, 27 and 30 mm Breastshields; Repalcement of Medela PersonalFit Breastshield (Extra Large, Large, Medium, Small) & Personal Fit Connector; Made by Maymom (26 mm (L-))