It is a product that can restore the pumping capacity of Medela's manual products. This pack incorporates two valves and six membranes made of silicone. These two accessories come together because one cannot work without the other. This means that the valve is the support and the membrane regulates the flow of breast milk.
The silicone from which both products are made is resistant and does not react with milk. Thus, they can be used without any danger of intoxicating the baby.
This pack also has other important features and benefits. Firstly, it is designed for use with most Medela manual breast pumps. Secondly, both accessories are very easy to attach to the pumps, as the design is very intuitive.