Maymom - Silicone Membrane for Backflow Protectors | Compatible with Spectra S1, S2. and 9Plus

Maymom Silicone Membrane; Designed for Spectra S1 Spectra S2, 9 Plus Backflow Protector and Maymom Backflow Protectors, Long, Short and Medium (White) 2pc/each After market silicone membrane for Maymom backflow protector (both short and long stem) and Spectra S1/S2 backflow protectors Change the silicone diaphragms regularly to optimize the performance of your breastpump Stronger material for improved performance It does not fit the old version of spectra backflow protector; see photo for details.