This product is designed to use with Medela Pump-In-Style Advanced breastpump, released after July 2006. It contains 2 breastshields, 4 valves, 8 membranes, and 2 pump-in-style tubing. The tubing has adapter on one end and soft on the other. The breastshield is designed in one-piece (Not Separable). In addition, we give you extra membranes so you can have …