A "breast flange" is a part used in breastfeeding equipment. It is a shaped funnel-like attachment that fits over a mother's nipple and helps draw out the milk during pumping. Full definition
It comes with a Pump motor, a pair of breast flanges, two bottles with teats and sealing discs, two sets of tubing, duck bill valves, a pair of back flow protectors and an AC adaptor. (electricbreastpumpwomen.com)
The Ameda Purely Yours is a closed system and has different breast flange size compatibility making it an ideal choice for those who want to share breast pump. (electricbreastpumpwomen.com)
Using breast flanges that are too big or too small can lead to breast issues such as sore nipples or damaged breast tissue. (verywellfamily.com)