Features: Ensure a comfortable and efficient pumping experience with our 24mm/27mm flange size, specifically designed to be compatible for S18 S21 wearable .<br>Our replacement pump part set features a duck mouth valves and silicone diaphragm, ensuring safety and durability for mother during their breastfeeding journey.<br>Tailored for nursing mother in need of convenient lactation support, these accessories are suitable for S18 S21 users seeking reliable replacements.<br>Whether at home, in the hospital, or while traveling, our milk collector cup and pump accessories offer ease and efficiency for breastfeeding moms travel.<br>The easy to clean designing and simple assembly of our wearable breast pump accessories make them a easy solution for maintaining your pump's performances.<br><br>Specifications: Component: PP+Silicone<br>Type: 24mm, 27mm(optional)<br>Valves: 20x25mm/0.8x1inch<br>Dustproof cover: 115x125mm/4.5x4.9inch<br>Diaphragm: 55x40mm/2.2x1.6inch<br>Applicable Model: for S18/S21 Wearable Breast Pumps<br>Quantity: 5pcs/set<br><br>Package Includes: 1 Set Breast Pump Accessories<br><br>note: Please allow 1-2cm errors due to manual measurement. <br>Please allow for slight color differences due to different display resolution.<br>