The connector itself does NOT work. You need to purchase a shield to make a usable flange system.
 
Maymom Base Connector, compatible with PersonalFit Shields.
Not original pump parts, i.e., Specta, Medela, etc.
 
NARROW: Compatible with Medela Breast Pumps. Use with PersonalFit, PersonalFit Flex, Lansinoh ComfortFit and FlexFit flanges, Maymom MyFit flange Series.
COMPATIBLE PUMPS: Pump In Style Advanced (but not PIS with Maxflow), Symphony (but not Symphony Plus), Swing (but not Swing Maxi), and Lactina. Works with Medela Valves, Bottles, Pump In Style Tubing, Swing Symphony, and Lactina Tubing.
 
WIDE: Works with Spectra wide-mouth bottles, AVENT bottles, and Maymom wide-mouth bottles. They are NOT compatible with OTHER wide-mouth bottles.
COMPATIBLE PUMPS: Spectra S1 pump, S2 pump and Spectra 9 plus pump. Suitable for Spectra S2 accessory replacement. Hands-free pump bra friendly.