Good if you need the bigger size
These flanges are great if you are a bigger size and need the larger room, but the medium inserts are kind of fumbly. If you place the bottles in the holders on the Ameda hospital grade pumps, the inserts often fall out hitting the floor and needing rewashing.
ProsBetter fit if you need it
ConsRemovable inserts fall out easy
Best UsesLarger size nipples