Calling all pumping mamas! This Nenesupply breast pump parts kit is here to save you time and money on replacement components. The set includes everything you need: two 27mm flanges, two connectors, two valves, and four membranes (just note tubing isn't included). These are designed to work seamlessly with Medela Pump in Style Advanced, Swing, and Symphony breast pumps - they're compatible and interchangeable with Medela's Personalfit connectors, tubing, valves, membranes, and bottles. The design is seriously thoughtful too - the longer tunnel and smooth angle make these more comfortable for those with longer nipples, and they're completely BPA and DEHP free for your peace of mind. The detachable 2-piece shields make cleaning so much easier, and they're dishwasher safe for maximum convenience. They even work with most hands-free pumping bras, which is a game-changer for multitasking moms. The quality is impressive - these aren't cheap knockoffs that'll fail after a few uses. They maintain that secure seal and proper suction you need for effective pumping sessions. Having spare parts on hand is crucial for breastfeeding moms - when one piece wears out or gets lost, you don't want to be stuck unable to pump. The 27mm size works well for many women, but always measure to ensure proper fit for your body. The valves and membranes are exactly what you need to maintain optimal suction power over time. Whether you're building a backup set for your diaper bag or replacing worn-out parts, this kit has you covered. Pumping is challenging enough without worrying about equipment failures - keep this spare parts kit handy and never stress about broken pump components again. Your breastfeeding journey deserves reliable equipment that won't let you down!