Review on 🍼 Maymom 21mm Flange: Compatible with Spectra S2/S1/9 Plus Breastpump - Replacement Parts & Accessories by Stephanie Traub

They are the same as my Spectra parts. It also came with 4 duck valves which was a nice surprise. I like that I can have spare parts without having to pay for the entire range. The only problem with flanges is that where the return connects, it's always loose. I have 2 sets of mimom and both are like this. If my elbow accidentally touches the reflux, it will come out. I don't have this problem with my original Specter flanges as they are very tight so I don't have to worry about losing backflow and suction.