Yeabetter18mm Flange Insert Compatible with Elvie Stride, S18 S21 S23, Medela, for Spectra S1 S2, TSRETE, Momcozy S9 Pro S10 S12 Pro Wearable Pumps, Reduce 24mm Breast Pump Flanges Down to 18 mm, 2PC

Yeabetter 18mm Flange Insert Compatible with Elvie Stride, S18 S21 S23, Medela, for Spectra S1 S2, TSRETE, Momcozy S9 Pro S10 S12 Pro Wearable Pumps, Reduce 24mm Breast Pump Flanges Down to 18 mm, 2PC

Maymom 18mm Flange and Duckbill Valve Compatible with Spectra S1 Spectra S2 Spectra 9 Plus Not Original Spectra Pump Parts Replace Spectra S2 Pump Parts Spectra Flange Spectra Duckbill Valve