Replacement Flanges for Leak Proof Pumping: Pair with our patented spill proof breast milk bags for the only leak proof wearable breast pumping experience Find Your Perfect Fit: Flanges are availble in 3 sizes: 21mm, 24mm, and 27mm; Reference Willow's size chart to determine your size for an optimal pumping experience Clear, Convenient Design: BPA free and dishwasher safe, breast pump flanges are easy to remove and clean; Clear color promotes easy nipple visibility and quick snap closure delivers fast assembly for the pumping convenience you deserve Compatible with Willow 360: Pair breast pump flanges with the Willow 360 Wearable Breast Pump. Pump untethered. No cords, tubes or stress. Trusted and True: Our flanges are covered under a 90 day limited manufacturer's warranty; Join the 300,000 moms who have brought Willow into their homes and lives Designed for a variety of breast shapes and sizes, Willow Breast Pump Flanges come in 21mm, 24mm and 27mm. Use our sizing chart to find your perfect fit and experience the convenience and flexibility of hands-free pumping. Pair breast pump flanges with the Willow 3.0 Wearable Double Electric Breast Pump. (Also compatible with generations 1 and 2.) Clear flange offers nipple visibility and makes assembly quick and easy. BPA free and dishwasher safe, our flanges are easy to clean. We recommend replacing pump parts every 3 months for optimal performance. Normal wear and tear can impact suction and output. You deserve a pump you love. Powerful, comfortable, fully in bra and app-connected, our wearable pumps for breastfeeding are simply built different. So cut the cords, ditch the dupes and join the 300,000 moms who have brought Willow into their lives. Find your perfect Willow breast pump today and unlock the convenience of hands-free pumping.