2x shields (23 mm, suitable for mothers with nippe diameter AFTER pumping 21-22 mm). Compatible with Selected 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). Also compatible with Lansinoh SignaturePro SmartPump Manual Pump, replace Lansinoh Pump Parts, Lansinoh Flanges. NOTE: connectors are not included in this listing. Not original Medela pump parts. Also compatible with Lansinoh SignaturePro SmartPump Manual Pump, replace Lansinoh Flanges. US FDA registered medical device (No. D192499); Comply with FDA regulations for plastic materials that contact food. Test reports are conducted by independent lab and available online for reference. Retail poly-bag packed; sealed by the manufacturer - Maymom, not original Medela parts. Made of Bisphenol-A (BPA)/DEHP-free material and. Can be cleaned with boiling water or water steam. Available in various sizes (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 34, 36mm) for purchase. It is well known that using the correct breastshield size is important for your pumping comfort and optimal milk supply. It is also known that two-piece design offers easy to clean and wider compatibility with hands free bra.