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 & 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/15mm/17mm/19mm/21mm/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/15MM/17MM/19MM/21MM/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.