Valves and membranes are the parts most replaced in breast pump sets. These parts are essential to create the pressure needed for the vacuum effect. With the EvonBaby Valve and Membrane for Medela, you can have clean parts on hand when you need to pump breastmilk. These 4 valves and 6 membranes can be used with all Medela Swing, Medela Lactina & Medela Pump in Style breast pumps.
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