Medela PersonalFit Flex Breast Shields (21mm) are designed to provide a comfortable and efficient pumping experience. The 21mm size is ideal for mothers seeking a personalized fit. These shields are compatible with all Medela breast pumps and are BPA-free./Description: The Medela PersonalFit Flex Breast Shields feature a unique 105° angle and oval shape, allowing for a 360° rotation to adapt to the natural contours of a mother's breast. This design helps to reduce pressure and improve milk flow. Clinical studies have shown that these shields can remove 11.8% more milk per minute compared to traditional breast shields. Made from BPA-free materials, they ensure safety for both mother and baby. The soft, smooth, and flexible rim provides a comfortable fit, making pumping sessions more pleasant. Each pack contains two 21mm shields, suitable for mothers who require a small size.. Please Note that product description, color, ingredients, package and other information maybe different from the original pack kindly check the product for more accurate details.