21 mm One-Piece Breastshield w/ Valve and Membrane Compatible with Medela Breast Pumps; Replace Medela 21 mm Personal…

Amazon.com Price: $6.94 (as of 09/24/2022 18:45 PST- Details)

21 mm internal diameter; Suitable for nipple diameter 19-20 mm AFTER pumping; One-piece design; easy to clean, less piece to keep, and less chance for suction power loss.
Made from BPA/DEHP-free material and all components are steam safe for sterilization.
Breastshield x1 (21 mm ID, Buy two sets if you do pumping both sides at the same time), Valve x 1, Membrane x 1; Compatible with all Medela pumps except FreeStyle, Maxi, Sonata and Harmony.