The Momcozy 17mm Flange Insert is a specialized accessory designed specifically for the S12 Pro breast pump. This transparent insert provides a customized fit for mothers who need a smaller flange size, ensuring comfortable and efficient pumping sessions. Key features: • 17mm diameter for precise fit • Compatible with S12 Pro model • Made of high-quality transparent material • Easy to clean and sterilize • Provides comfortable suction seal • Helps optimize milk expression The flange insert is designed to be inserted into the standard S12 Pro pump flange to reduce the opening size to 17mm. This allows mothers who need a smaller flange size to use their pump comfortably and effectively. The transparent design makes it easy to ensure proper positioning and monitor milk flow during pumping sessions. Regular cleaning and sterilization is recommended for hygiene maintenance.