1、COMPATIBLE WITH: These membranes are compatible with popular breastpump models, including for Pump In Style, for Symphony, for Swing, for Harmony, and mini electric breastpumps, ensuring versatility and convenience. 2、INTERCHANGEABLE DESIGN: Easily swap these membranes with for Nenesupply membranes for compatibility and flexibility, allowing you to customize your pumping experience. 3、OPTIMAL SUCTION PERFORMANCE: Experience consistent suction power comparable to original parts, providing efficient and effective pumping sessions every time with these membranes. 4、EASY MAINTENANCE: Designed for quick and no hassle removal from the flange, these replacement silicone membranes for breastpumps make regular maintenance and replacement a breeze. 5、ROBUST MATERIAL: Crafted from excellent quality silicone, these membranes come in a pack of 50 for long lasting durability and performance, ensuring reliable use for your pumping needs.