These versatile silicone inserts will reduce the flange size to 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19m, 20mm or 21mm. 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!

Great tool for Lactation Consultants to use for sizing. Heat resistant - can be sterilized in boiling water.

Compatible with following pump Flanges and more: 

• Medela

• Spectra

• Lansinoh

• Motif

• Elvie

• BabyBuddha

• Hygeia

• Evenflo

• Willow

• MomCozy

• Elvie

• Youha

• Ardo

• & MORE