Features: Breast Pump Flange Inserts: The breast pump flange inserts help to narrow the shield nipple tunnel and work well with breastfeeding pump to bring better performance and using experience for small nipple mother. Seam-less Compatible for Breastfeeding Pump: Best solution for small-nippled nursing moms by use the flange inserts to achieve reduce the shield nipple tunnel down to the accordingly size as you need, seam-less and high compatible for most brand breast pumps. Selected Material: The breast pump flange inserts use soft silicone, skin-friendly and excellent seal with perfect performance, BPA free and safety material for delicate skin. Easy to Clean: Our silicone flange inserts are easy to change and clean, dishwasher friendly, soft and food grade material could take good care of your delicate breast skin and smoothly pumping as well. 6 Optional Sizes: Our breast pump flange insert with 6 optional size to select, 13mm or 15mm or 17mm or 19mm or 21mm or 24mm, suitable for mostly breast pump, electric or manual all applicable, before purchase please make sure you choose the correct size Specifications: Product Dimension: As pictures shown Material: Silicone Style Option: 13MM or 15MM or 17MM or 19MM or 21MM or 24MM Package Includes: 1 x Silicone Flange Inserts for Breast Pump note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.