Back up pump that was taken out of box but I never got the chance to use it since I had a primary pump already. Includes: new pump, 4x tubing, 1 power adapter, 6 membranes, 4 valves, 4 connectors, 4 24mm breast shields, 2 27mm breast shields and 2 30mm breast shields2 quick clean steam bags, 4 medela breast pads, various 5 ounce medela bottles.