2x shields (21 mm, suitable for mothers with niple diameter AFTER pumping 19-20 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 known as small breastshield, compatible with Medela 21 mm shield. Also compatible with Lansinoh SignaturePro SmartPump Manual Pump, replace Lansinoh Pump Parts, 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. 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. Maymom MyFit 21mm Two-Piece Design Small Breastshields, Compatible with Medela Breast Pump; Ideal for HandsFree Bra; Not Original PersonalFit Flex Breast Shield,Not Original Freestyle Pump Parts, 2pcs