[HIGH COMPATIBILITY] Nuliie flange sizing kit 17/19/21mm (12pcs) fit most 24mm electric and manual wearable breast pumps. It will reduce the 24mm shield nipple tunnel down to correct size. Note: Not compatible with 27-28mm shields.

[MUST-HAVE ACCESSORY FOR BREAST PUMPS] Enhance your pumping comfort and efficiency with our essential flange inserts. The soft and flexible silicone provides a gentle and secure fit, helping to create a smoother and more comfortable pumping experience. A must-have for any breastfeeding mother who needs to pump milk.

[SAFE & EASY TO CLEAN] Ensure safety and maintain the performance of your breast pump with our flange inserts. Made from food-grade liquid silicone and free from BPA, these inserts are easy to clean and dishwasher safe. We recommend washing them promptly after each use and replacing every 2 months to keep optimal functionality. Plus, includes a complimentary cleaning brush.

[CARING SERVICE] With our silicone flange inserts, you receive a free nipple measurement ruler to help you choose the perfect size. Compare the size of your nipple before and after pumping to ensure the most comfortable and effective fit. We provide unparalleled after-sale for mothers by answering your questions anytime and anywhere.

[FRIENDLY REMINDER] Nipple size can vary throughout different breastfeeding stages, requiring different sizes of flange inserts for your breast pump. If you're aware of your exact nipple size, we recommend purchasing the corresponding size directly. However, if you're unsure, we suggest starting with our 12-pack of Flange Inserts, which contains five different sizes to ensure you find the perfect fit.