Wearable Breast Pump Parts Milk Collector Cup 27mm Flange Compatible with Momcozy/TSRETE S9/S12 Pump Replacement Parts, Extra 1pcs Duckbill Valve&Diaphragm

This milk collection set is a great quality replacement set. It fits my pumps perfectly. They are easy to assemble and clean too.

This set is a good spare to have around for when you need a quick pump. It works as advertised with the momcozy pump, but does different in a couple of ways which might affect output but I am an under producer so I can't tell for certainty. However, the seal on the flange is not a double seal like the original so I worry that it may leak on me one day. But nonetheless, this is great to have when you need to pump but your pump parts are dirty! Definitely a lifesaver in a pinch.