Motif Medical Flanges for Breast Pump: The right breast shield size is important for a comfortable and effective pumping experience. Motif Medical Aura Glow breast pump flange inserts are designed to provide the perfect fit, helping moms pump easily and without discomfort. They work with the Motif Aura Glow Breast Pump, a lightweight, quiet, and portable option, perfect for moms with busy schedules. These flange cushions for pumping set come with 2 breast shields. The shields are available in 15, 17, 19, & 21 mm, ensuring better comfort and milk production. Breast pump flanges create a seal to gently extract milk. If the flange size is wrong, it can cause blocked milk ducts, pain, and reduced milk flow. That's why Motif's pumping accessories focus on making the pumping experience as easy and comfortable as possible. Make sure to measure carefully using a nipple flange measuring tool and choose the right size for great results.