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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Nenesupply 21Mm Flange Replacement Kit Compatible With Spectra S2/S1 Breast Pumps, Including Ducksbill Valve, Backflow Protector, And Other S2 Accessories And Parts
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