4PCS Flange Insert 21mm for Momcozy M5/M6/M9/S9 Pro/S12 Pro/V1 Pro/Medela/Spectra/Lansinoh/Elvie/Eufy 24mm Flange/Shield, Silicone Sizing Kit, Reduce Tunnel Down to Other Size

Perfect Compatibility & Sizing Kit: This 4-pack includes 1 sizes: 21mm. Designed specifically for 24mm flanges/shields, It will reduce the 24mm shield nipple tunnel down to 21mm Compatible with：It is compatible with Momcozy M5/M6/M9/S9 Pro/S12 Pro/V1 Pro/Medela/Spectra/Lansinoh/Elvie/Eufy, and most other pumps using a 24mm flange Safe, Soft & Easy to Clean: Crafted from high-quality, food-grade liquid silicone, these inserts are BPA-free, and incredibly soft, They gently cushion the nipple to reduce friction and discomfort during pumping, Plus, receive a complimentary cleaning brush for added convenience Important Compatibility Note: Nipple size can change throughout your breastfeeding journey, so the flange size that worked before may no longer be the best fit, If you already know your exact size, you can purchase the corresponding inserts directly, If you're unsure or your size varies, we recommend starting with our 10-pack Flange Sizing Kit. It includes five different sizes (13/15/17/19/21mm), allowing you to try them on and find the most comfortable and effective fit for your need Perfect Gift for New Moms: Our silicone flange inserts help mothers quickly and comfortably find the right size, ensuring a smooth pumping experience