The reusable Lactina Single and Double Pump Sets were designed for the Medela Lactina Select and Lactina Electric Plus Breastpump. Due to its unique design, the pump set can also be used as a manual breastpump. The pump set includes everything you need as a breastfeeding mother, when using the Lactina Hospital Grade Breastpump. The pump set contains a breastshield in size M (24mm). If another size is needed, different PersonalFit Breastshield sizes are available: S (21 mm) M (24mm) L (27 mm) XL (30 mm) XXL (36 mm) Medela ensures maximum comfort for every mother, because it can offer breastshields in a wide range of sizes. A bottle for 150 ml breastmilk is included in every pump set. Free of Bisphenol A All components of the pump set that come into contact with the breastmilk are BPA-free.