Designed to work with Medela breast pumps, these flanges are compatible with models like Pump in Style with MaxFlow, Symphony, Freestyle, Sonata, Swing, and also fit many Lansinoh pumps. (These are compatible parts, not original Medela components). Features a precise 105° wide flange design. This wider contour is intended to fit and cover the breast more comprehensively, which may be particularly suited for mothers seeking enhanced comfort. Combined with the oval, rotatable design, it helps you find a personally more comfortable position. The soft-edge design is intended to contour to the breast, reducing contact with hard plastic. This design aims to provide a comfortable experience during pumping sessions. Made with materials that meet food contact safety standards (BPA Free) and are odorless. Most parts are detachable, can be washed with water, and are suitable for steam sterilizers for hygiene. To meet individual needs, we offer a complete size matrix from 13mm to 30mm, including 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm (this ASIN for 20mm). This helps you choose precisely based on your measurements, aiming to enhance your pumping comfort. Breast Flanges 19mm 2-Pack for Medela Pump in Style, Symphony, Freestyle, Sonata, Maxflow and Lansinoh Signature Pro Breast Pumps