Set of 2 - For Silicone Collection Cups Legendairy Milk Inserts are exclusively designed to fit right inside your Silicone Collection Cups as well as most 24 mm traditional plastic breast shields.  Not Returnable Item. BREAST PUMP AND KIT NOT INCLUDED. Compatibility: Legendairy Milk Inserts are compatible with both the Silicone Collection Cups and most traditional 24/25 mm plastic breast shields aka flanges. Tip: The insert is very soft and pliable — when inserting it into a hard plastic shield, applying a dab of Pumping Spray or coconut oil to the hard plastic shield may help the insert slide in more easily. Includes: Pack of two (2) Legendairy Milk Inserts based on the selected size. Caring and Cleaning Guidelines: Sterilize before first use by submerging the inserts in a deep and wide pot of boiling water for 3-5 minutes. The inserts should be fully submerged in water and not touch the bottom or sides of the pot. Do not sterilize and avoid using high heat after initial sterilization. Hand wash in warm soapy water then rinse clean after subsequent uses. Using cold sterilization or UV sterilization is also permissible. Do not wash inserts in the dishwasher. Replace every 3 weeks, depending on the frequency of use. Warning! Choking Hazard - keep away from infants and children. Replace parts right away if they become torn or damaged. Disclaimer! Before purchasing this product, please download our nipple ruler or use your measuring tool of choice. Key Benefits Reduce the diameter of your breast shield for better output Obtain an optimal breast shield fit Minimize pain and discomfort caused by an improper breast shield size Make a better seal This product is