2-Pack 29mm Flange and Duckbill Valve for Spectra S1/S2/9+

Seamless Spectra Pump Compatibility：Engineered for Spectra S1, S2, 9 Plus, and Synergy Gold pumps, Complete Replacement Kit content:2 Flanges (29mm), 2 Duckbill Valves, No adapters, no guesswork—just secure click-and-go convenience. Whether you’re a first-time mom or a seasoned pro, setup should be instant and intuitive Durable & Built Tough：Milkflow custom duckbill valves feature a reinforced base + non-slip grip zone, enabling dual-direction assembly/disassembly. Our design prevents direct pulling force on fragile top areas, significantly reducing deformation risks while minimizing tip cracking – extending part lifespan up to 1.3X longer Find Your Ideal Fit:We offer 9 flange inserts for spectra: 13mm, 15mm, 17mm, 19mm,21mm, 24mm, 26mm, 28mm, 30mm, to ensure a precise, comfortable fit. Same suction power as OEM parts.Proper sizing reduces discomfort, enhances milk output, and promotes a more efficient pumping experience—because comfort drives performance Skin-Safe, Pumping-Friendly Design：Crafted from BPA-free, the ultra-smooth surface minimizes friction for skin—critical for extended or frequent pumping sessions. The low-noise design ensures discreet comfort, whether at home, work, or on the move Leak-Proof Seal for Reliable Performance：Designed to form an airtight connection with Spectra wide-neck bottles and milkflow bottles, this flange prevents milk leakage—eliminating mess and stress. Pump at any hour, anywhere, with uncompromised reliability