Product description
BFF Wide Neck Flange and Accessories for Spectra
-All Spectra pumps (S1/S2/M/9+/Dual Compact/Synergy Gold S) and older Spectra breast pumps (Dew 350, 360)
-All Medela pumps except Swing Maxi, FreeStyle and Harmony.
Connects directly to Spectra backflow protector; no need for yellow flange adaptor!
Pumps into wide-neck milk bottles ONLY (e.g. Spectra Bottles, Philip Avent, etc. Some bottles may require additional bottle gasket for tighter fit.) So if you are planning to use this on Medela, you will not be able to use Medela narrow neck bottles.