About This [Perfect Fit for Your Spectra Pump]Compatible with Spectra S1, S2, and 9 Plus pumps. The wide-mouth flanges and duckbill valves connect securely, ensuring a smooth pumping experience every time. [Multiple Sizes for Every Mom]Available in 13–30mm sizes, so you can find your perfect fit. The right flange size helps reduce discomfort and improve milk output, making pumping more efficient. [Gentle & Comfortable Design]Smooth edges and skin-friendly silicone duckbill valves help minimize irritation during frequent sessions, giving moms a more relaxed and natural pumping routine. [Reliable Suction, Less Waste]Flanges form a secure seal with Spectra bottles, helping maintain steady suction and preventing leaks—so every drop of your liquid gold is safely collected. [Easy to Clean & Reassemble]Parts can be quickly detached and rinsed after each session. Safe to sterilize with steam, boiling water, or microwave steam bags for hassle-free daily use. [Ideal for Any Situation]Whether pumping at home, in the office, or during night sessions, this set ensures consistent performance, making it easier for moms to keep up with their routine. [Safe, Durable & Mom-Friendly]Made from food-grade, BPA-free materials for safety and durability. Regular replacement keeps parts performing at their best. Our team is here if you need help. Overview Brand : BALIME Special Feature : Ergonomic, Lightweight, Painless, Portable, Wearable Material : Silicone Included Components : Duckbill Valves *2, Wide-Mouth 13 mm Flange*2 Material Type Free : BPA Free