Review on Spectra S2 & S1 Breast Pump Replacement Kit - 27Mm Flange, Duckbill Valve, Backflow Protector Compatible W Nenesupply Parts. by Emmanuel Nguyen

As much as I like saving a dollar or two, I shouldn’t of skimped on these parts. The backflow protector didn’t fit snuggly and would easily pull apart, the duckbill valve made a weird noise and it somehow would just spray milk sorta up towards the backflow protector. Not sure what my exact issue was with these products but the day after I went and got authentic spectra pieces, and works so much better, as far as suction, noise, and amount it emptied from me.