Maymom Breast Pump Kit Compatible with Medela Pump in Style Advanced Breast Pumps; 2X Breastshields (one-Piece), 27mm, 4 Valves, 6 Membranes, & 2 Tubings; Can Replace Medela Valve, Pumpinstyle

Contains 4 valves, 6 membranes, 2 pump-in-style tubes and 2 ONE-piece breastshields, 27 mm (large breastshield); Compatible with Medela Pump in style advanced pump. NOT compatible with FreeStyle, Swing Maxi, Sonata, Harmony, Pump in Style with Maxflow Pro Pro+. This 27 mm shield is not for every mother. Measure your niple diameter first after a pumping session. Choose one that is 1-2 mm larger than your niple diameter.. This is a Maymom made product, not original Medela pump parts. All parts in this kit are interchangeable with Medela pump accessories. Being one piece design, this kit can fit Simple Wishes hand free bra, but not every home-made or medela bra on the market.. This is kit is all you need to pump except bottles and the main motor. Bottles are not included. This kit is compatible with Medela bottles. All parts are BPA free and DEHP free.. US FDA listed class II medical device - safe to use and same suction as the original OEM pump kit.. NICE BABY SHOWER GIFT - Nicely packaged in a carton box. Great gift for mother to be.