Make sure you keep your Medela pump running smoothly with this set of Medela Spare Valves & Membranes. These valves and membranes are compatible with all Medela breast pump models except the Freestyle. They are made from 100% BPA free materials to ensure you and your baby are safe from toxic chemicals. Save time by pumping more milk faster and more efficiently with a new set of valves and membranes. These spare parts are also good to keep in case of an emergency so you can always prepared when you damage or wear out your old valves and membranes.