2x shields Pano Series ( 19mm, suitable for mothers with niple diameter AFTER pumping 17-18 mm) , Compatible with Medela pumps (New Medela Pump in Style with MaxFlow, Pump in style, Lactina, Symphony, Swing, Mini Electric FreeStyle, Swing Maxi, Sonata, Freestyle Flex and Harmony). NOTE: connectors are not included in this listing. Also compatible with Lansinoh SignaturePro SmartPump Manual Pump, replace Lansinoh Pump Parts, Lansinoh Flanges. Flange opening is 105 degree, more suitable for mothers with large breasts or flatter contour breasts; Soft and flexible edge for more comforts; Larger cup size for more covered area of breasts during pumping; elliptical-shaped design to rorate and adapt for comfortable pumping US FDA registered medical device (No. Available in various sizes (15, 17, 19, 21 mm) for purchase.