1、Material: The calibre converter is made of silicone material, which ensures that the product is safe and reliable during use, and remains stable for prolonged periods of time to protect the health of you and your baby. 2、Calibre Design: The accessory effectively reduces the calibre of the pump, making it fit more closely to the nipples, thus significantly improving the adsorption effect. At the same time, it reduces the mother discomfort and enjoys a smoother breastfeeding experience. 3、Wearable Design: The pump accessory wearable design is not only compact and lightweight, but also easy to carry, ready to provide convenient breastfeeding support for mothers, so that mothers can easily solve the problem of pump calibre mismatch in their busy lives. 4、Easy to Install: Simple and easy to install, no extra tools required, user friendly design makes the whole process easy and fast, even first time mothers can get started quickly, saving valuable time and energy. 5、Universal: General adaptation for most pumps, wide applicability to meet the individual needs of different users, allowing mothers to choose the pump that best suits their own and individual needs. Item Type: Flange Inserts Material: Silicone 5 x Flange Inserts 4 x Accessory