2x One-Piece Breastshield ( 17 mm internal diameter) , 2 Valves, 4 Membranes; Compatible with all Medela pumps except FreeStyle and Harmony.;US FDA registered medical device (No. D192499); Complies with US FDA and EU standards 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 (15, 17, 19, 21, 24, 25, 27, 30, 34, 36 mm) for purchase.