Breast Pump Flange Inserts Adaptor 13-21mm Nipple Size Converter Accessories. Enhance Your Breastfeeding Experience with Our Versatile Breast Pump Accessories, Designed to Provide Comfort and Efficiency for Nursing Mothers. Crafted from Food-grade Silica Gel, These Inserts Are Gentle on Sensitive Skin and Free from Any Odors. They Are Compatible with Traditional, Plug-in, and Wearable Electric Breast Pumps, Allowing for Broad Adaptability to Suit Your Needs. Our Flange Inserts Come in Four Different Sizes (15mm, 17mm, 19mm, 21mm), Ensuring a Perfect Fit and Preventing Nipple Trauma or Irritation for Mothers with Smaller Nipples Using Larger Pumps. With a Lightweight and Practical Design, They Make Milk Expression More Comfortable. Experience the Ultimate in Convenience and Care with These Essential Breastfeeding Accessories. Features: - Broad Compatibility with Various Breast Pump Types - Available in 15mm, 17mm, 19mm, and 21mm Sizes - Made from Odor-free, Food-grade Silica Gel - Soft and Safe for Sensitive Skin - Lightweight: 15g / 0.52oz - Color: White and Transparent Note: Milk Pumps Shown in Illustrations Are Not Included..