The Philips Avent Hands-Free Premium Plus SCF552/11 are silicone inserts for the Philips Avent Hands-Free breast pump system. These inserts provide a comfortable and efficient pumping experience thanks to their thoughtful design and soft fit. They adapt to various breast and nipple sizes, ensuring reliable and pleasant positioning. The SkinSense technology gently responds to body heat, conforms to the shape of the breast, and promotes effective milk extraction that mimics the natural rhythm of a baby's sucking motion. This contributes to optimal milk flow while ensuring a secure and comfortable fit. The correct size can be easily determined using the included measuring card. With a minimal number of components, these inserts are easy to clean and assemble. Each package contains two breast shields with a diameter of 28 mm and two inserts with a diameter of 26 mm, along with the measuring card. Made from silicone rubber, they are specifically designed for compatibility with the Philips Avent Hands-Free breast pump collection cups.