From the Manufacturer
A simple way to support breast feeding for your baby, the SimplyGo Single Manual Breast Pump is small, handheld, portable, convenient and diaper-bag ready. The SimplyGo Manual pump has only 8 pieces. It is easy to clean, assemble, and use. The unique MemoryFlex band provides a consistent return, and the ergonomic handle is designed for additional hand comfort for mom while pumping, and a new valve prevents milk backup in flange. The pump's increased flange size accommodates more moms; standard flange size starts at 28.5 mm, but can be reduced to 24.5 mm with the included silicone insert. All components are BPA free and come with a 5oz bottle.