These versatile silicone inserts will reduce the flange size to 13mm, 15mm, 17mm, 19m or 21mm.

Compatible with following pump Flanges and more:

Spectra

Medela

Lansinoh

Motif

Elvie

BabyBuddha

Hygeia

Evenflo

Willow

MomCozy

Elvie

Youha

They work great with wearable breast pumps and collection cups! Compatible with: Medela. Spectra, Motif, Lansinoh, Elvie, Willow, MomCozy, Freemie Cups, LegendairyMilk Cups, and many more!

Heat resistant - can be sterilized in boiling water