Content: Expertly Designed 21mm Flanges/Breastshields x2, Duckbil Valves x2, Backflow Protectors x2, Tubes x2. Made by Pumpmom, Not original Spectra Pump Parts. Comfort: PumpMom flex shield with soft rim creates a more natural fit during the pumping session. Improve breast suction efficiency: PumpMom flex shield uses upgraded 106° wide angle opening, oval shape Shields create better fit during pumping. Compatibility: Compatible with Spectra S1 Spectra S2 Spectra 9 Plus Breastpumps. Material safety: Made with Food Grade Polypropylene(PP), BPA and DEHP Free. Sealed by the manufacturer. Pumpmom Shield & flange kits are manufactured in strict accordance with professional standards, closely matched with Spectra components. Compatible and interchangeable with Spectra valves, bottles and backflow protectors.