Calling all pumping moms! These Nursi Luna replacement flanges are absolute lifesavers when your original parts wear out. The 19mm size fits perfectly if that's your measurement, and they're compatible with S1 and S2 pump models. Made from 100% food-grade silicone that's seriously gentle on sensitive skin - no more irritation from rough or cheap materials. They're BPA-free and completely safe for you and your baby. The suction power is just as good as the original OEM parts, so you don't have to worry about decreased performance. Cleaning is a breeze since they're easy to sterilize and maintain. The backflow protectors work like a charm too - no milk will back up into the tubing, which means less cleaning and more efficient pumping sessions. When you're pumping multiple times a day, having reliable, comfortable parts makes such a difference. These hold up well through repeated use and sterilization without losing their shape or effectiveness. If you're tired of replacing expensive original parts or just want a comfortable backup set, these Nursi Luna flanges deliver quality and reliability at a much better price point. Your pumping routine will thank you!