Hey mama! If you're pumping with a Spectra and need replacement parts, these PumpMom flanges and duckbill valves are total lifesavers. They work perfectly with Spectra S1, S2, 9 Plus and Synergy Gold pumps - giving you that same great performance without the brand name price tag. You get two 18mm small flanges AND two duckbill valves in this set, which is awesome because those valves need replacing every few months anyway. The two-piece design makes cleaning so much easier - no more struggling with complicated parts that trap milk residue. They're dishwasher safe (top rack only!), can handle steam cleaning, and even boiling water if you need to sterilize them. Made from food-grade polypropylene that's completely BPA and DEHP free, so you know they're safe for your baby. They work with all hands-free pumping bras too, which is a game changer when you're trying to multitask. The quality is seriously good - they feel just like the originals but cost way less. Having extras means you're not stuck waiting for parts to dry between pumping sessions. The 18mm size is perfect if you need something smaller than the standard flanges that come with most pumps. They create the same secure seal and comfortable fit as the expensive brand name versions. Seriously, if you're tired of paying premium prices for replacement parts, this set gives you everything you need to keep your pumping routine smooth and affordable. The packaging is sealed for hygiene, and they arrive ready to use. Many moms find these actually work better than the originals because the duckbill valves provide consistent suction without losing effectiveness over time. Stock up now and save yourself the last-minute panic when parts wear out!