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

I read a few bad reviews but I needed something for my wearable pump so I took a chance with these. They fit the Missaa wearable pump you can get on Amazon and do the job. Pumping was kinda painful but now is not. They’re soft and fit in my silicone flanges great. I highly recommend measuring yourself and getting the right flange/insert size for you. It makes a world of difference and can help you continue your pumping journey. These were a lifesaver for me!

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.

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.

Worked perfectly for my momcozy pump. Make sure you confirm that the parts are compatible with the exact pump (thr first set i ordered didn't fit at all due to it being for a different pump)

I have purchased several valve/diaphragm replacement sets from other sellers for my Momcozy S12. I have never had any complaints. However, listen to the reviews on this brand. #1. The picture of the item depicts a clear, standard-looking valve set. However, the actual item is a cloudy, powdery-feeling silicone. #2. The silicone is of low-quality. It is a very soft silicone, with a diaphragm that barely fits on the motor housing hole. The result is poor seal and, therefore, poor suction. #3. The duckbill valves are also very soft silicone, and they arrived compressed in a box. After taking them out, I realized there was a space in one of the valves, which makes it useless for suction and vacuum. #4. This item is apparently "unavailable for return," which is ridiculous. I bought 2 other sets, and both of them from other sellers could be returned (I checked out of curiosity). I had to contact Amazon directly to request help with this item. Any seller that does not provide return policies is an automatic red flag. I suggest running from this item, if you are trying to buy the valve/diaphragm set.

Works well but I feel the duck valves tend to slip off. They are shorter than my previous ones.

Lost a piece to my Momcozy part and these worked! Thankful for the extra available parts.

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.

Fonctionne bien avec mon Momcozy S12

It does not have enough suction capacity

I only received 3 pieces not 4

The title states its compatible with s12pro but its definitely not, its twice the size of my momcozy s12 pro original duck bill valve no way it'll fit.

I bought this for my mom cozy s12. Right out of the gate the material and shape of the valve felt different. I gave it a chance for over a week - the suction with these parts is not strong at all, and the pump was barely pulling milk. I went back to use my old used parts and it functioned much better. I know it’s more money but if ordering for your Momcozy pump, order the mom cozy replacement parts.