Maymom Backflow Protector for Spectra S2 Spectra S1, 9 Plus Breastpumps W Bonus Flange Adapters. Replaces Spectra Backflow Protector, Spectra Silicone Diaphragm; Replacement Spectra Pump Parts ; 4 pc

Maymom Backflow Protector Compatible with Spectra S2 S1, 9 Plus Breastpumps with Bonus Flange Adapters. Replacement Spectra Pump Parts Backflow Protector Silicone Diaphragm; 4 pc

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

Maymom Duckbill Valves for Spectra. Designed for Spectra S1 Spectra S2 Spectra 9 Plus Spectra Dew 350 Not Original Spectra Pump Parts Spectra S2 Accessories Replace Spectra Valve (6 ct White)