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Wasn't sure these would seal as well as the originals, but my output is back to normal after swapping in the new silicone valves. The diaphragms are nice and flexible too, and being BPA-free is a relief since they touch the milk. Two of each in the bundle means I've got backups ready when these wear

The valves and diaphragms fit my pump perfectly, so I didn’t have to fuss with any adapters. They’re BPA-free, which gives me peace of mind, and after two weeks of daily use, they still hold a tight seal.

The silicone diaphragms are noticeably sturdier than the flimsy ones that came with my pump, and they fit perfectly without any fiddling. The valves snap in cleanly and I've already noticed a more consistent suction during my sessions. I bought this as a backup, but honestly it's become my go-to set