NOTE: connectors are not included. You need to have them or purchase them from OEM company . Made of Bisphenol-A (BPA)/DEHP-free material and all components are steam safe for cleaning. Available in various sizes (10, 12, 13, 15, 17, 19, 21, 22 (crater), 23, 24(smooth), 24 (crater), 25, 26, 27, 29, 30, 32, 34, 36mm) for purchase. Retail poly-bag packed; sealed by the manufacturer - Maymom, not original Medela parts. US FDA registered medical device (No. D192499); Products are inspected by US FDA. Complies with US FDA and EUstandards for containers that contact food and class II medical device; Test reports are online for your reference;. 2x Two-Piece Breastshield; Crater shape best for bowl-like breasts; (22 mm, suitable for mothers with nipple diameter after pumping 20-21 mm) , Long nipple tnnnel (44 mm); longer than OEM (35mm). Best for elastic nipple and no more nipple hitting the back of the flange. Compatible with Medela pumps (New Medela Pump in Style with MaxFlow, Pump in style, Lactina, Symphony, Swing, Mini Electric, FreeStyle, Swing Maxi, Sonata and Harmony) NOTE: connectors are not included.