Flange Inserts for Perfect Fit: Our 10PC set of flange inserts is designed to provide a secure and comfortable fit for wearable breast pump cups. With sizes ranging from 13mm to 21mm, you can choose the insert that best suits your individual needs. Enhanced Comfort and Efficiency: These flange inserts help improve comfort during pumping and support efficient milk expression. A proper fit helps reduce discomfort and enhances overall pumping performance. Easy to Use: Simply select the desired size and insert it into your breast pump cup for a secure and customized fit. The process is straightforward and requires no special tools. Durable and Safe Materials: Made from high-quality, safe materials, these flange inserts are built to last and safe for use. They are free from harmful substances and designed for repeated use without loss of quality. Compatible with Various Breast Pumps: Designed to work with a wide range of wearable breast pump cups, these inserts offer versatility and convenience. Whether you use different brands or multiple cups, they adapt easily to your pumping routine.