Flange Inserts 13/15/17/19/21mm, Compatible with Medela, Willow, TSRETE, Momcozy S9/S10/S12 Wearable Hand Free Breast Pump, Reduce 24mm Shield/Flange Nipple Tunnel Down to Correct Size.Problem Solved: Achieve optimal comfort and efficiency during pumping with our Flange Inserts. Reduce the nipple tunnel size to 13mm/15mm/17mm/19mm/21mm, ensuring a perfect fit and enhancing your pumping experience.Product Details:Size: Flange inserts are available in 13mm, 15mm, 17mm, 19mm, and 21mm sizes.Quantity: Each pack contains 5 flange inserts.After-sales Support: We offer comprehensive after-sales support to ensure your satisfaction with the product.Imagined Post-Purchase Scenario: Picture yourself confidently using our Flange Inserts with your preferred breast pump, whether it's Medela, Willow, TSRETE, Momcozy S9/S10/S12 Wearable Hand Free Breast Pump, or other compatible models. Enjoy comfortable and efficient pumping sessions, knowing that the reduced nipple tunnel size provides an ideal fit and improves your overall experience.Choose our Flange Inserts to enhance your pumping journey and say goodbye to nipple swelling and discomfort. Experience the joy of comfortable and effective pumping sessions by selecting the correct flange insert size. Make your breastfeeding journey a positive and enjoyable one.Note: To maximize compatibility, please ensure that your breast shields are 24mm in size. The flange inserts are not suitable for 27mm shields.