2x One-Piece Breastshield (24 mm ) , 2 Valves, 4 Membranes; Compatible with all Medela pumps except FreeStyle and Harmony.;US FDA registered medical device (No. D192499) and 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;;Retail poly-bag packed; sealed by the manufacturer.;Made of Bisphenol-A (BPA)/DEHP-free material and all components are steam safe for sterilization.;Available in various sizes (19, 21, 24, 25, 26, 27, 29, 30, 34 and 36mm) for purchase.