I was having trouble finding out if these were compatible with momcozy cups (these are the s12 cups). Thrilled that they are. No issues to report! Such a game changer for pumping.

Use to connect spectra pump to medala elbow

Ya lo devolvi no le quedó Ami EXTRACTOR

I use them for my Spectra S1 as I prefer the medela bottles and flanges.Works perfectly.

Works as expected, connecting my Maymom breast shield to the back flow protector that came with my Spectra S2 pump. Note: the maymom breast shield does come with one adapter, so this will only be used as a "spare part"

These are a great product. I left the following review under the Spectra pump but since I wasn't a "verified purchaser" since I got my spectra from insurance I think it might not be seen. Now I'm using these Flange adapters, the medela flanges with medela valves and pumping 5-7 oz in 6 mins (highly effective in my opinion). I think using these with the Medal pump parts (all from Maymom) is a cost-effective and efficient way to go. It takes advantage of the Spectra's superior pump and the Medela's better designed flanges and valves. Compared to the cost of formula this is the way to go if you are able to breastfeed.Spectra vs Medela pump in stylebackground: breastfed and pumped for 2 children each for a year with Medela pump in style with no real issues, though the milk filling the tubing was annoying and the valve membranes wore out every now and then and tubing had to be replaced a few times. With #3 learned about the Spectra from people at work and since insurance would cover it I received from them. I've now been using an old Medela and the Spectra with the new baby and have these pros and cons to share.Medela pros:- valves work better (though they are flimsy and membranes need to be replaced sometimes they provide a much better seal)- adjustment is incremental (not leveled)Cons:- tubing gets gross when milk gets into it- missing some of the cool features of spectraSpectraPros:- backflow protector so tubes always are clean- light for pumping at night or in dark room- timer (very helpful for me so I don't zone out and accidentally pump for 30 mins)- more different types of adjustments that you can play with (this could also be seen as a con depending on your perspective)- "hospital grade" pump- very very quiet (much quieter than the medela)Cons- valves seem to not work as well as the medela- bottle flange doesn't fit standard bottles (like dr. browns)- jumps in the levels can be a bit intense, I've worked up to L5, but I find it hard to handle sometimes, though the higher levels do get more milk faster- The very slight incremental adjustments of the medela are easier- coordinating the cycle length and levels can be a little harder to manage than the simpler adjustments of the medela.Adjustments:I've played around with different configurations, I am now using the Maymom medela valves on the spectra flanges, I plan to get the maymom flange adapter connector piece so that I can use the Medela flanges with the spectra pump. When I use the medela valves on the spectra I get between 1-2 ounces more in a short session 6-7 minutes!If you go with the Medela (which is still a fine option, and worked for me for two years without issue) I would get the spectra backflow protectors to avoid the tubing getting filled with milk, also just plan on buying some more valves.With a smartphone you can mimic some of the features of the spectra there's a great free app "babynursing" to help with timing of breastfeeding sessions and pumping, and a flashlight on the phone can be helpful at night.Good luck!