Flange Sizing Kit with Pink Ruler

19mm missing from kit everything else is sealed and unused! Enhance your pumping experience with the Flange Sizing Kit. This essential kit includes a pink sizing ruler and multiple flange sizes for optimal comfort and efficiency. Perfect for moms seeking a customized fit. Nuliie 10PCS Flange Sizing Kit 13/15/17/21mm for 24mm Flange/Shield of Most Pumps, Silicone Flange Inserts Replacement Kit, Pumping Essential Kit for Moms