Content: Expertly Designed 21mm Flanges / Breastshields*2, Duckbil Valves *2. Made by PumpMom, Not Original Spectra Flanges. Compatibility: 2x 21mm flanges and 2x duckbill valves compatible with Spectra S2, Spectra S1 and Spectra 9 Plus Breastpump. Improve breast suction efficiency: PumpMom flex shield used upgraded 106° wide angle opening, Oval shape Shields create better fit during pumping. Comfort: The flex shield with soft rim creates a more natural fit during the pumping session. Material safety: Made with Food Grade Polypropylene(PP), BPA and DEHP Free. Sealed by the manufacturer.