Say goodbye to the hassle of testing teat sizes and selections. Our replacement parts are available in a variety of sizes, ensuring you can find the correct size for your nipple.Made from food-grade materials, our products are safe and free from BPA, giving you peace of mind while using them. Compatible with any other brand of breast pumps with an inner diameter of 24mm, our converter prevents the caliber of the breast pump horn from being too large and excessive sucking on the areola.We understand that many moms have nipples that vary in size and can change size at different times. That's why our breast pump converter is designed to cater to these changes, providing a comfortable and efficient pumping experience.With our breast pump converter, you no longer have to worry about finding the right fit or compromising on safety. Item Name: Breast Pump Part Material: Silicone Features: Perfect Fit, BPA-Free, Food-Grade Size Details: Diameter: 4.6cm/1.81", Height: 3.4cm/1.34" (Approx.)Suitable After Breastfeeding Nipples Diameter Range: 13mm Breast Pump Converter: 0.9cm-1cm/0.35"-0.39" (Approx.)15mm Breast Pump Converter: 1.1cm-1.2cm/0.43"-0.47" (Approx.)17mm Breast Pump Converter: 1.3cm-1.4cm/0.51"-0.55" (Approx.)18mm Breast Pump Converter: 1.4cm-1.5cm/0.55"-0.59" (Approx.)19mm Breast Pump Converter: 1.5cm-1.6cm/0.59"-0.63" (Approx.)20mm Breast Pump Converter: 1.6cm-1.7cm/0.63"-0.67" (Approx.)21mm Breast Pump Converter: 1.7cm-1.8cm/0.67"-0.71" (Approx.)24mm Breast Pump Converter: 2cm-2.1cm/0.79"-0.83"(Approx.) Notes: 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. Package Includes: 1 x Breast Pump Part