Full Set Milk Collector Cup Compatible with Momcozy S12 Pro/S9 Pro Hands-Free Breast Pump Wearable,Upgrade Duckbill Valve for Original S9 Pro/S12 Pro Replacement Pump Parts(NOT for S9/S12),Flange 24mm

The Duckbill valve has been upgraded. It is now easier to install compared to the original version, and it does not affect the suction.Only compatible with Momcozy S9 Pro/S12 ...
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