The 27mm flange is a reliable accessory that allows you to collect milk comfortably and efficiently during breastfeeding. It is designed for use with the Momcozy M5 breastpump and offers versatility. We recommend replacing the flange regularly every 1-3 months to ensure optimal performance and hygiene during breastfeeding. With this product, you can be sure that you are taking care of your baby's health and comfort.