This little piece here, squishing up against the breast, is the infamous flange. Why is it so important? Well because without it your pump won't pump.

My Willow® pump isn't moving to expression. Any tips?

This Tiny Piece Of Your Breast Pump Makes The Whole Thing Work — Or Not

The First Years Double Electric Breast Pump, Quiet Expressions : Baby

What if Your Breast Pump Flanges are TOO Small?!

This little piece here, squishing up against the breast, is the infamous flange. Why is it so important? Well because without it your pump won't pump.

Troubleshooting common breast pumping issues

CONTENT: Maymom flange 17 mm; 1 pc; buy two if you pump two sides at the same time. USE: Compatible with Ameda Mya Joy, Mya Joy Plus, Purely Yours

Maymom Breast Shield Flange Compatible with Ameda Breast Pumps Purely Yours, Finesse, NOT for Ameda MYA(17 mm, X-Small, 1-Piece)

Flange Insert 19mm,wearable breast pump flange suitable for almost any wearable breast pump, for example S9/S10/S12 breast pump. Milk Collector 24mm

Flange 19mm Replacement,Suitable for S9/S10/S12,Wearable Breast Pump Shield/Flange Insert,Milk Collector 24mm Universal

7 Common Pumping Mistakes- And What To Do Instead - Swaddles n' Bottles

Slouching toward airworthiness