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Amazon.com : PumpMom Backflow Adapter for Spectra S1, Spectra S2 Pump to Use Most Medela Flanges and Bottles; Connects Between Medela Breastshield and Spectra Backflow Protector (Pumpmom Flange Adapter) : Baby
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Amazon.com : Nenesupply 5 pc Duckbill Valves Compatible with Medela and Spectra Pump Parts Use on Spectra S2 Spectra S1 and Pump in Style Harmony Symphony Replace Spectra Duckbill Valves and Medela
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Amazon.com : Nenesupply Long Stem Backflow Protector Use Medela Pump Parts Breastshield on Spectra S1 S2 and 9 Plus Breastpumps. Not Original Spectra Pump Parts Inc 2 Long Backflow Protectors : Baby
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