17mm Flange Insert Compatible with 24mm Flange/Shield of Breast Pumps, for Momcozy S9 Pro S10 S12 Pro Medela Spectra Elvie Stride TSRETE S18 S21 S23 Bellababy kmaier NCVI MomMed BIOBOO

Love that these came in super fast and were ready to be washed and used! I got both 14 and 15 mm flanges and they both work well for me!

Great fit! No more little titty problems!

These made it easy to measure and determine what flanges I needed to purchase. Ended up sharing with multiple girlfriends when they had their babies. Definitely worth the price!

I like that it’s made from a durable material.Serves you in the long run.

Good: durability and cleanliness, easy to read.Bad: smells horrible, no instructions included. I wasn’t sure if numbers were the correct measurement or the flange size.

Worked and held up for over a mitnh

I got the variety pack of 2 each, which were a great deal. But they don't fit well in the spectra and medela 24mm flanges, or at least the ones I need (19mm and 21mm) don't. I'm going to try them in the 28/27mm flanges, but I don't know if that will work. How am I the only one with this problem.

They get 5stars because they saved my poor nips and that’s worth a lot. So I have now bought 6 sets of these which 5 oh were EXACTLY as described and work super great all sizes were there. Well one of the packs which happened to have 3 of 1 size and only 1 of another which happened to be the size I need, so that’s a bit frustrating but like I said the other 5 I bought were exactly as described so just make sure you make sure all sizes are accounted for in pairs.