S9/S12/S9pro/S12pro Duckbill Valve and Silicone Diaphragm, Compatible with NaNaLazy/TSRETE/momcozy, Wearable Breast Pump Replacement Parts Accessories (4 Piece Set)

I’m a breastfeeding/pumping momma who purchased a Momcozy pump and has a bit of elastic nipples. The size 24 flange I think runs a little big and it has a short “tunnel” so my nipple was getting pulled back far and getting pinched in the top while causing pain and loosing suction. I tried a Maymom insert and cut it to fit bit no luck. I tried the beaugen which worked a but was annoying. Sticky, never really adjusted to the correct size (always loose) and turned an ugly yellow color. I tried these and was worried they wouldn’t work because it covers the suction hole. But they worked! It covers the suction while but there is still room between the suction and the insert so it doesn’t effect output. I was so happy they worked I cried! This is the only insert that worked for me and my Momcozy pump. Saved my pumping journey especially now that I EP. In another review I saw that their insert stuck out a bit but mine goes all the way in. The first two weeks it’s snug and you have to gently push it in or even fold it a bit and flatten it out in the Momcozy pump. Over time it “molds” and slides in perfectly.

After the original duckbill valve tore, I found these replacements were half the price of the original parts so I decided to try them. You can tell the material is thicker and a little different than the original manufacturer's parts, but it does work as intended. They have outlasted the original part so far (by about a month) and have not started to show any wear. I would buy them again.

Review update:Received the wrong size flanges; seller reached out to communicate with me what the problem was and fixed the issue. Seller is attentive to buyers and flanges are recommended for proper sizing pumps. As you know one size does not fit all when it comes to our pumps.

I was so nervous to order these. From the photo I had no idea how it would fit on my momcozy. I ordered them anyways because the momcozy size I had was way too big and hardly got any milk.Getting the right size flange is a HUGE deal in pumping and helping you produce more milk. (Be sure to get measured at the hospital after baby and they'll help you get the right size!)But this product came in and is great quality. It was easy to assemble to my momcozy and was seamless (you can hardly notice I added them to the inside). They were the correct size for what I needed and helped create a stronger suction! The only downfall is it's one more thing to take off and remove but soooo worth it for having the right size flange.

These do not work properly with my mom cozy. The membrane doesn’t pull up and release properly making my duck bill not release the milk and it backs up into the Falange. Waste of money.

They worked like the original but the material is a little different and instead of clear, it’s a foggy color. Doesn’t seem to grip as good as the original but I haven’t had a problem with it working differently so Im happy with it

Works great for my Momcozy s9pro

fit me perfect, didn't come warped or anything. very soft & flexible.