18mm 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

I absolutely love this!! The material is perfect!

The media could not be loaded.  So grateful for these flange inserts! They work like a dream! I have small nips and this size was perfect and fit great in the flange of my Bella baby electric pump! Great price helps too!

I use the 20mm flange insert with a Spectra S2 24mm flange. I wish the insert fit more snug into the pump. There is always breast milk in between the flange and the insert. While I wash the flanges, inserts and bottles in between every pump, I think the constant removal of the inserts will cause them to need to be replaced more often. Just my own opinion. Other than that I’m happy with the product, price and quantity they came in.

Ordered these to use with my Elvie pump, they work great to downsize the flange! Sadly I was sent 2 different sizes as a set!! Now I can only use 1 at a time.

They seem to run small

Why....? We don't have one boob.. we have 2 boobs. Why would you only include one of each size. Having to use different sizes on my pump.

I bought these on a whim, hoping they would fit my Bellababy wearable pump. To my surprise, they do well. They aren't the snuggest fit, and they will fall out if you flip the pump's tunnel side toward the ground. For wearable pumps on a budget, this is a great combo.

These do NOT fit in my 25mm flanges. There is a huge gap around them! I ordered 2 sets and they are not eligible for returns?! So now I am out $30 and don’t even have inserts that are useable! Terrible design! I ordered from another seller and they fit just fine.