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Measure to maximize your output and comfort: sizes 21mm , 24mm , 27mm
Smaller than 21mm? Snap our sizing inserts into our 24mm flanges to reduce the size of the flange tunnel (compatible with 24mm flanges only)
Keep a spare set of pump parts on hand to minimize clean-up between sessions
Replace your parts regularly for optimal pumping performance
Exclusively for use with the Willow Go pump
Dishwasher-safe
Not made with BPA
