PUMPMOM-US19mm Oval Flange Pump Parts for S1 S2 9 Plus Breast Pump, Replacement 19 mm Breast Shield/Duckbill Valves/Backflow Protector/Silicone Tubing

Works like a charm! And I actually like this set up (where the parts are detachable) way more than what came with the pump originally.

Perfect set for spectra with the added bonus of being able to fit any Mandela flanges if needed on it

The only thing I am having a problem with is the flanges. My body isn’t responding properly to them.

Love these sets for my lacteck flanges. While the flanges this comes with are nice and comfortable, I prefer silicone. The other parts work well and last quite some time. I exclusively pump and haven’t had to change these out after a month so far.

This is a great kit for replacing pieces or having extras. They feel well made and work as well as the name brand ones.

No issues with fittment on my Spectra S2 (and thus shouldn't have any issues with an S1 since they are the same pump with different power sources). The key pieces here are the duckbills, tubing, and diaphragms; I didn't really need the extra flanges, but I suppose they're nice to have around just in case. Overall a replacement set that works and meets my needs, at a lower cost that OEM parts!

These started off great and fit perfectly in the Spectra S2, but over time my partner noticed that the silicone around the edges began to crease and bend. So the original parts for that model would likely work best, but these are great in a pinch.

I use a spectra 1 and these extra spare parts and flange have made pumping and cleaning schedule much easier. I prefer a non-detachable flange for the bottle top, but they work just fine and are probably easier to clean when you can pop the flange top off. The valves and tubing are great to have on hand as extras, as you have to change them out every few months!