I bought these items to replace the original tubing and duckbill valves on my Spectra S2. They both fit well and are easy to connect to the flange/pump and easy to remove. I like that the tubing is longer than the original ones. I have also purchased extra flanges and storage bottles from Nenesupply and have been happy with those purchases.
Nenesupply 21Mm Flange Pump Parts - Compatible Replacement Kit For Spectra S2/S1 Breast Pumps With Essential Accessories
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Maymom 15Mm Flange Insert Compatible With Elvie Single/Double Electric, Elvie Stride Cup (24Mm), Compatible With Medela PersonalFit Flex Shield, Not Original Elvie Replacement Pump Parts
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