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Amazon.com: Medela PersonalFit Flex Breast Shields, 2 Pack of Small 21mm Breast Pump Flanges, Made Without BPA, Shaped Around You for Comfortable and Efficient Pumping
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Amazon.com : 21 mm One-Piece Breastshield w/ Valve and Membrane Compatible with Medela Breast Pumps; Replace Medela 21 mm Personal Fit Breast Shield and Connector; Made by Maymom : Breast Shells : Baby
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Amazon.com: Medela PersonalFit Breast Shields, 2 Count of Small 21mm Breast Pump Flanges, Authentic Medela Spare Parts, Made Without BPA
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Medela PersonalFit Flex Breast Shields (2pcs) 21mm/ 24mm/ 27mm/ 30mm for Freestyle Flex/ Swing Maxi Flex/ Swing Flex
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