⚫Function: Serves as the central body connecting the breast flange, silicone diaphragm/backflow protector, and milk collection bottle.

⚫Design & Fit: Wide-neck threaded base for secure bottle attachment, with integrated ports for the duckbill valve/diaphragm and air suction tubing connector.

⚫Material: Made from food-grade, 100% BPA-free, high-quality translucent Polypropylene (PP) plastic. Safe for mother and baby.

⚫Maintenance: Easy to disassemble, clean with warm soapy water, and steam-sterilize or boil. Replace if cracked or worn to maintain optimal suction.