Set of 2 - For Silicone Collection Cups Replacement Breast Shields to be used with your Silicone Collection Cups, not compatible with our Imani i2. Our flange inserts are compatible only with the 24 mm and 28 mm breast shields, our flange inserts are NOT compatible with the 21 mm breast shields. Not Returnable Item. BREAST PUMP AND KIT NOT INCLUDED. Caring and Cleaning Guidelines: Sterilize before first use by submerging the Breast Shields in a deep and wide pot of boiling water for 3-5 minutes. The Breast Shields 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 Breast Shields in the dishwasher. Replace every 2-3 months, depending on the frequency of use. Full silicone breast shields:Provides improved comfort and fit compared to traditional plastic breast shields 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. This product is