It is well known that using the correct breastshield size is important for your pumping comfort and optimal milk supply. It is also known that one-piece design offers easy to clean, fewer pieces to keep, and no seams to lose...

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It is well known that using the correct breastshield size is important for your pumping comfort and optimal milk supply. It is also known that one-piece design offers easy to clean, fewer pieces to keep, and no seams to lose suction power.

Medela does not offer 17 mm breastshield. Maymom is the first company world-wide to offer 15, 17, 19, 21, 25, 26, 27, 29, 30, 34 and 36 mm internal diameter one-piece design breastshields to fit Medela users' personal pumping needs. The valve/membrane in this set are interchangeable with your existing Medela parts. Maymom has more than 5 years experience in making breast pump parts. 100% compatibility is guaranteed or your money back!

Disclaimer: Medela, Freestyle, Pump in style, Symphony, Lactina, and Swing are registered trademarks of Medela Holding AG, Switzerland. Maymom is not affiliated with Medela nor does Medela endorse the product.



  • 2x One-Piece Breastshield ( 17 mm internal diameter) , 2 Valves, 4 Membranes; Compatible with all Medela pumps except FreeStyle, Harmony and MaxFlow Pro Pro+.
  • This product is NOT for everyone. It is suitable for mothers with niple diameter 14-16 mm (AFTER a pumping session) and niple length shorter than 17 mm during a pumping cycle. DO NOT use this product if your niple dimensions are outside these ranges to prevent discomfort..
  • US FDA registered medical device (No. D192499); Complies with US FDA and EU standards for containers that contact food and class II medical device; Test reports are online for your reference; Retail poly-bag packed; sealed by the manufacturer.
  • Made of Bisphenol-A (BPA)/DEHP-free material and all components are steam safe for sterilization.
  • Available in various sizes (15, 17, 19, 21, 24, 25, 27, 30, 34, 36 mm) for purchase.
  • 2x One-Piece Breastshield ( 17 mm internal diameter) , 2 Valves, 4 Membranes; Compatible with all Medela pumps except FreeStyle, Harmony and MaxFlow Pro Pro+.
  • This product is NOT for everyone. It is suitable for mothers with niple diameter 14-16 mm (AFTER a pumping session) and niple length shorter than 17 mm during a pumping cycle. DO NOT use this product if your niple dimensions are outside these ranges to prevent discomfort..
  • US FDA registered medical device (No. D192499); Complies with US FDA and EU standards for containers that contact food and class II medical device; Test reports are online for your reference; Retail poly-bag packed; sealed by the manufacturer.
  • Made of Bisphenol-A (BPA)/DEHP-free material and all components are steam safe for sterilization.
  • Available in various sizes (15, 17, 19, 21, 24, 25, 27, 30, 34, 36 mm) for purchase.

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