eufy 15 mm Sizing Insert (2-Pack) for Wearable Breast Pump E10/E20/S1/S1 Pro E10/E20/S1/S1 Pro Sizing Insert 15mm*2

HSA/FSA Eligible: Save with pre-tax health dollars. Compatibility: Compatible with eufy Breast Pump E10 / E20 / S1 / S1 Pro. Easy to Install and Use: Enjoy hassle-free, simple setup and operation. Sizing Guide: Refer to our sizing guide to select the right size for optimal comfort. Nipple size may change during different breastfeeding stages, requiring different sizes of inserts. We recommend replacing flange inserts every 1 to 2 months. Customized Comfort: Find the perfect fit for your unique needs and experience comfortable, smooth breast pumping with our silicone flang