Wearable Breast Pump Parts Compatible with S18 S21 Pump

[Full S21 Collection Cup Set]: A complete S21 portable breast pump set includes one 24mm/27mm flange, one collection cup, one duckbill valve, and one silicone diaphragm. Made from food-grade materials, this set is safe and comfortable, perfect for breastfeeding mothers. It perfectly complements your S21 breast pump, allowing you to relive the authentic breastfeeding experience.

[Safe and Non-Toxic Material]: Made from durable, BPA-free, food-grade silicone. The soft, odorless components are skin-friendly and gentle, protecting both mother and baby.