17mm Silicone Flange Inserts Compatible with Momcozy S9 Pro S10 S12 Pro, Paruu P10 P3 R12, TSRETE, kmaier, MomWills, for Spectra S1/S2, Medela Breast Pump, Reduce 24-25mm Tunnel to 17mm, 2pcs

They fit will with my Momcozy S12 Pump. the duck valves are a little longer then the factory ones but they work i just have to make sure they are all the way on when assembling the pump.

Does not actually fit the Paruu P10. False advertising. Got a second pump to be able to pump more throughout the day while my normal one charges, got these to fit it said it was compatible. Does not fit even though it says it does.

I'm always a little nervous to order a part that is compatable with another brand, but these duck bills fit my MomCozy pump PERFECTLY at such and affordable price!

This replacement valve was a life saver ! Always good to have a back up . I pumped regularly and these lasted me a longgg time

I loved the size and durability of these. Other brands tore when cleaning (especially the small attachment on the end) but these haven’t ANY issues (3 months now). They fit my Mom Cozy S9 perfect & I prefer them over what came with the pumps originally.

Bought this for my Tsrete since it says it is compatible. The duck bill is to big and does not fit snuggly therefore not usable. Went with a different brand.

They fit and work nicely, after a while I change them cause they get loose and also stained.

This wearable breast pump whole bowl milk collector is great! It is easy to take apart & put back together. Cleaning is very simple. It fits my MomCozy S9 perfectly. I would recommend this product 100%. Also the price is very affordable! Lastly the picture of this product is 100% accurate.