Wearable breast pump replacement set with 4 diaphragms and 4 duckbill valves, compatible with Momcozy S9Pro and S12Pro models. Third party replacement, not original manufacturer parts. Key benefits worn or damaged components to keep your wearable pump working as intended. Keep spare parts on hand to reduce downtime between uses and simplify cleaning rotation. Compact, easy to store and carry so you can maintain pump readiness while traveling or at work. What is included Four diaphragms and four duckbill valves packaged as a single replacement set. Function and compatibility Designed to serve as direct replacement parts for compatible wearable pump assemblies for Momcozy S9Pro and S12Pro models. Standard fit for the indicated models to help ensure proper seating and operation when installed according to the pump manufacturer instructions. Material and build Flexible components engineered for repeated use and routine cleaning. Intended for frequent replacement as part of normal maintenance. How it performs Provides the pump components used in the disposable or replaceable sections of wearable pumps so you can swap out parts that are stretched, torn, or worn. Sold as a set to cover multiple replacements or backups. Practical use scenarios Daily caregiver: valves and diaphragms after extended use to keep parts that contact the pump and tubing fresh and functioning. Travel and work: Pack a spare set to switch parts during trips or long days away from home so cleaning and drying time does not interrupt pump availability. Shared care: Keep an extra set when sharing a pump between caregivers so each person can use a clean set of components when needed. Notes This is a third party replacement set, not original manufacturer branded parts. Confirm compatibility with Momcozy S9Pro and S12Pro before . Follow the pump manufacturer guidance for correct installation, cleaning, and replacement intervals.