NENESUPPLY21mm Flange Insert Compatible with Elvie Flange Pump Parts Elvie Stride Flange Momcozy Medela Flange Spectra Willow Reduce 24mm to 21mm Use as Elvie Inserts Medela Insert Momcozy Insert

These fit into my Elvie stride perfectly. I don’t love that they’re not see through so it can be hard to line up your nipple. They do the job and they’re comfy though.

They fit perfectly with My Elvie Stride. I havent used them yet.

Fits my breast pump. Has helped with leakage as my flange was too big.

Worked great! Just what I needed however I wish they were clear so I could see right placement and if it’s working and is the correct size. 3 stars only for lack of clearness

But correct size and a great fit. Sizing is so important!

They are okay. They did not wow me. Milk gets stuck between this insert and the piece you insert it into. Idk if it is a user error or what. If you can get past that, they’re decent

Pros: Product is made of soft silicone which is very comfy and is easy to use. It also sits well in the flange and does not move while in use. Inserts were shipped on time and arrived undamaged.Cons: even though it fit my Elvie stride it's not snug enough so it leaks and the pump ends up not suctioning properly. I bought 2 sizes 19 mm and 21 mm they both have the same issue. When buying the product I made sure it was returnable before I ordered. BEWARE: it is NOT returnable even though it states "Return policy: Eligible for Refund or Replacement." Also like everybody else mentioned it would be great if the inserts were clear it would help a lot with troubleshooting and I could probably fix the fitting issue if I could see how it's working while in the flange.I was so excited when I found these only to be disappointed. I am now stuck with these inserts that I can not even use.

Did the job! Originally had bought a 17mm, but my lactation consultant sized me to a 15mm and I feel much better and comfortable. Came quick too. Sterilized fine as well.

Marketing is misleading: it DOES partially block the upper holes of the elvie (the ones giving it its succion). That said, sizing is right, it works, but does significantly lower succion. I didn’t cut it as it’s good enough for my purpose (I have an oversupply), but it may make a significant difference for underproducers. I got about half of what I usually get with my spectra, in twice the time. They could likely easily fix this problem by doing a sharp external slope on the pump side opening of the silicone, I don’t know why they didn’t just mold it like that, seems simple enough, *especially* for small nipple sizes. Beware.

Using the 19mm on my 27mm medela and 24mm momcozy and comfort is great. Thick silicone so should last. Very soft. Happy with this product!

Used with momcozy S9! Fit perfectly

Popped these inserts into my 24mm flange that my wearable elvie breast pumps came with. Slid right in. Nice tight fit no issues. Suction was good. And definitely helped me with my nipple size. I could have bought the 21mm flange right from elvie but these are a fraction of the cost and work great! Plus I’m in Canada so elvie product is just harder to come by

Item description is a total lie! These should be removed from amazon and not be available for sale. The description says it does not block the suction hole, but it DOES, and DOES NOT WORK with Elvies. TOTALLY false advertising.