These Momcozy diaphragm + valve is suitable for use with any following breast pump: Momcozy S9 Pro and S12 Pro wearable breast pump. The diaphragm is used to help the breast pump maintain the seal to prevent milk leakage. The duckbill valve can be used to drain milk to the bottom of the container.

The general service life of the duckbill valve is about 2-3 months. If it is found that suction is not good, it will reverse flow, and milk doesn't go into the collector, it is generally that the valve is not closed well and needs to be replaced.

Breast pump diaphragm and valve; 1Pcs; for Momcozy S9pro & S12pro breast pump
The authentic Momcozy breast pump diaphragm and valve is suitable for use with Momcozy S9 Pro & S12 Pro wearable breast pump.(ONLY SUIT FOR S9/S12 Pro)
Easy Cleaning, Wash Momcozy pump parts after each use with warm soapy water and rinse well.
BPA Free, made of plastic material. Can be sanitized with water steam, boiling water or microwave-steam bags. All Momcozy pump parts that come in contact with breast milk are BPA free, giving you peace of mind about your baby's milk.
Made For Moms, By Moms, We've committed our lives to provide the best breast pumps, accessories, education, and customer care that we can, supporting every mother with the beauty of parenthood.