"Contents: 2 Shields, 2 Wide-mouth Connectors, 2 Duckbills (3rd Gen). The shield and connector constitute a breast pump flange. The whole set works for double pumping. Flange Features: Separable TWO-PIECE flange for spectra pump, NOT like one-piece Spectra flange. Made by Maymom. Two-piece construction is preferable for easy assembly, disassembly and cleaning. It also fits most hands free pumping bra on the market and home-made bra. Available shield sizes :19mm, 21mm, 24mm. "Compatibility: This set is compatible with Spectra Pump S1, Spectra S2, Spectra 9 Plus. Compatible ONLY with widemouth(wideneck) bottle, like Spectra wide-neck bottle, Maymom widemouth bottle.
