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.

Suction issues,Check your flange fit

Blog — Mrs. Nipple

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How to master breast pump flange fit — The Lactation Network

Slouching toward airworthiness

Slouching toward airworthiness

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

Content：Begical 2pc 22mm Flange Made By Begical. Suitable For Mother With A Nipple Diameter 19-21mm (Measured After A Pumping Session). Compatible

Wearable Breast Pump 22mm Flanges Compatible with Momcozy/Tsrete/kmaier/hezkugu Breastpump Replacement Parts Replace Flange Insert Silicone Shields

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