PumpMom-us Pump Bottle Adapter, Baby Bottle Thread Changer Converter for Spectra S1 S2 Wide Mouth Flanges to Use Standard Sized Bottles. Compatible with Medela, Ameda Narrow Neck Bottles

PumpMom-us Pump Bottle Adapter, Baby Bottle Thread Changer Converter for Spectra S1 S2 Wide Mouth Flanges to Use Standard Sized Bottles. Compatible with Medela, Ameda Narrow Neck Bottles

Maymom 21mm Flange and Duckbill Valve Compatible with Spectra S1 Spectra S2 Spectra 9 Plus Not Original Spectra 20mm Replace Pump Parts Spectra Flange Spectra Duckbill Valve

PumpMom Backflow Adapter for Spectra S1, Spectra S2 Pump to Use Most Medela Flanges and Bottles; Connects Between Medela Breastshield and Spectra Backflow Protector (Pumpmom Flange Adapter)