The wearable breast pump flange insert accessories are suitable for use with 24mm Flange/Shield of Most Pumps. Easy cleaning, wash breast pump parts after each use with warm soapy water and rinse well. Please use boiling water/steam, with a temperature of around 100°C (212°F). BPA-free, made of food-grade silicone material. All pump parts that come in contact with breast milk are BPA-free, giving you peace of mind about your baby's milk. 8 size provide, 13/15/17/18/19/20/21/24. Different lactation periods provide more cozy experience, selection of the right flange size can help the breast milk to drain smoothly. Attention these breast pump accessories are only suitable for 24-25mm Shields/Flanges and cannot be used with other sizes of shields/flanges. The size of the flange insert is significant for comfortable and efficient pumping. Some moms experience nipple swelling while expressing, so it is advisable to observe the appearance of the nipple during pumping. It is an unsuitable flange size and you need to replace the right size flange insert. Specification: Color: White Special Feature: Lightweight Material: Silicone Material Type Free: BPA Free Is Dishwasher Safe: Yes Package List: 8 x Flange Inserts The wearable breast pump flange insert accessories are suitable for use with 24mm Flange/Shield of Most Pumps. Easy cleaning, wash breast pump parts after each use with warm soapy water and rinse well. Please use boiling water/steam, with a temperature of around 100°C (212°F). BPA-free, made of food-grade silicone material. All pump parts that come in contact with breast milk are BPA-free, giving you peace of mind about your baby's milk. 8 size provide, 13/15/17/18/19/20/21/24. Different lactation periods provide more cozy experience, selection of the right flange size can help the breast milk to drain smoothly. The size of the flange insert is significant for comfortable and efficient pumping. Some moms experience nipple swelling while expressing, so it is advisable to observe the appearance of the nipple during pumping.