For your new Medela Pump in Style with MaxFlowTM, Freestyle Flex, and Swing Maxi Breast Pumps, Medela's PersonalFit FlexTM Connectors provide a closed system. To make cleaning easier, there were fewer pieces and large apertures. Excellent as a spare set or a substitute for worn-out or broken connectors. Connect to PersonalFit breast shields, which let you customize the size of the flange and are sold separately. Replacement connections that are tested and made to fit your Medela breast pumps are only available from Medela.