Maymom 12 Count Duckbill Valves for Spectra S1 Spectra S2 Spectra 9 Plus. Not Original Spectra Pump Parts Replace Spectra Duckbill Valve Not Original Spectra S2 Accessories Work w/Spect (White.18)

Maymom Silicone Membrane; Designed for Spectra S1 Spectra S2, 9 Plus Backflow Protector and Maymom Backflow Protectors, Long, Short and Medium (White)

Nenesupply Compatible Silicone Diaphragm for Spectra Backflow Protector Use on Spectra S2 Spectra S1 Spectra 9 Plus Not Original Spectra S2 Accessories. Replace Spectra Pump Parts

Maymom Wide Neck Pump Parts for Spectra S1/S2 Pumps; Incl Wide Mouth Flanges; Not Original Spectra Flange; Replaces Spectra Shield (28 mm Two Flanges)

Maymom Backflow Protector Compatible with Spectra S2 Spectra S1 and 9 Plus Breastpump Not Original Spectra Pump Parts Not Original Spectra S2 Accessories Replace Spectra Backflow Protector

Replacement Tubing for Spectra S2 Spectra S1 Spectra 9 Plus, BPA Free Replace Spectra Tubing Avent Tubing Ameda Tubing Made by PumpMom(Not Original Spectra S2 Accessories)

PumpMom Spectra Backflow Protector, Replacement Breast Pump Backflow Protector for Spectra S1 Spectra S2 Spectra 9 Plus Breastpumps, BPA/DEHP Free(Not Original Spectra Pump Parts)

Nenesupply Compatible Flange for Spectra S2 Spectra S1 Spectra 9 Plus Breastpump. Made by Nenesupply. Not Original Spectra Pump Parts Not Original Spectra S2 Accessories Not Original Spectra Flange

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)

Maymom Pump Parts Compatible with Spectra S2 Spectra S1 Spectra 9 Plus Breastpump, Flange (24mm) Valve Tubing Backflow Protector, Not Original Spectra Pump Parts Not Original Spectra S2 Accessories

Nenesupply Compatible Backflow Protector for Spectra S2 Spectra S1 and 9 Plus Breastpump Not Original Spectra Pump Parts Not Original Spectra S2 Accessories Replace Spectra Backflow Protector