Breast Pump Kit for Medela Pump in Style Advanced Breastpump. Includes 2 Tubing, 2 Breastshields (25 mm, Medium), 4 Valves, 6 Membranes; Replacement Kit for Medela Pump Parts, Made by Maymom - Walmart.com
Amazon.com : Maymom Pump kit Compatible with Medela Pump in Style Advanced; Replacement to Medela Pump Parts : Baby
Amazon.com : 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 : Baby