
2x Maymom® brand back flow protectors (plastic housing and membranes).
Compatible with Spectra® S1, S2, 9 Plus, and M1. Also compatible with Freemie® open system Deluxe Kits, Pumpables®, and may also work with Ameda® pumps and others (please contact me for more information)
Used to prevent moisture getting into the pump. Replacement membranes available separately as well