[https://www.amazon.com/dp/B0DLNPVS35?tag=dmflip-20&linkCode=ogi&th=1&psc=1]
Maymom Flange Inserts 21mm Compatible with Spectra, Medela 24 mm Shields, Momcozy S9 Pro/S12 Pro, Willow Wearable Cup. Compatible with Medela Freestyle, Harmony, to Reduce 24mm Down to 21 mm; 2pc
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