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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 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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Maymom Pump Parts Compatible with Spectra S2 Spectra S1, incl 21mm Flange Valve Tube Bottle Backflow Protector [S001W-F21.5in1B] - US$20.00 : Maymom Wholesale Shopping Cart
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PumpMom Backflow Protector and Tubing for Spectra, Replacement Breast Pump Parts for Spectra S1 Spectra S2 Spectra 9 Plus (Not Original Spectra S2 Accessories)
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Amazon.com : Spectra - Backflow Protector Replacement Part for Breast Milk Pump - Breastfeeding Support Essential - Compatible with Spectra Breast Pumps : Baby
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