Duckbill Valves & Silicone Diaphragm for Wearable Breast Pumps & Collection Cups - Idaho Jones, Tsrete, Kmaier, Momcozy S9, S12, S9 Pro, S12 Pro Replacement Parts

These work just as good as the original ones

Did NOT fit my Ikare pump

These are great.

very hard to tell size by description and picture

Pieces are standard quality but I was a bit confused with the listing about being compatible with Spectra. The membrane pieces and duckbills are not and will not fit Spectra s1/2 pump parts So don’t expect to buy these as a backup.

Firstly, if you are looking for Spectra parts these are specifically compatible with Spectra CaraCups. This is not compatible with Spectra S1, S2, etc.The products are in separate bags and each bag has a tamper resistant seal which is great to see. The quality of the silicone feels really good, and I wouldn't expect them to tear during normal use. The have a good seal when pumping and I didn't have a leaking issues. For the price this is a great option. Everything feels like it is OEM and nothing feels cheap or concerning.In conclusion I really liked this set, just make sure you know that your pump is compatible, not only with the brand, but the specific model.

These didn’t work well and lost suction often.

It was a snug fit and little bit of a struggle, but I was able to get the membranes on. I did notice slightly better output/suction with them (it was about time to replace anyway, so tried these instead of my usual ones). I could not for the life of me get the duck bills on. They need to be just a smidge bigger. No amount of pushing, pulling, leverage, etc would get them on. The listing says they’re compatible with “your favorite electric breast pump, like spectra….” - I knew this style would not work with my Medela, so was using them with my Spectra Synergy Gold.While only able to use half of the set, they all seem to be of good quality, like other items I have used from this seller. Fix the duckbill issue and you’re looking at 5 stars!