Please note, this item ships from an international seller. Expected delivery is 10-15 days. Features： Broad compatibility, suitable for traditional pump, plug-in pump, and wearable electric pump. 3 sizes of flange inserts suitable for different pumps: 17mm, 19mm, and 21mm, ensuring that every mother has fitted shield. Practical for small-nippled mothers to use large shields, avoiding nipple trauma or irritation. Made from food grade silica , no odor, friendly to mothers' sensitive skin, secure to use. A practical pump replacement for breastfeeding, making milk expression more comfortable and efficient. Specifications： Color: White and transparent Material: Silica Product Size: 17mm/ 0.66inch; 19mm/ 0.74inch; 21mm/ 0.82inch Product Weight: 15g/ 0.52oz Note： The milk pumps showed in the pictures are not included. Package List： 3 * Flange Inserts Broad compatibility, suitable for traditional pump, plug-in pump, and wearable electric pump. 3 sizes of flange inserts suitable for different pumps: 17mm, 19mm, and 21mm, ensuring that every mother has fitted shield. Practical for small-nippled mothers to use large shields, avoiding nipple trauma or irritation. Made from food grade silica , no odor, friendly to mothers' sensitive skin, secure to use. A practical pump replacement for breastfeeding, making milk expr