Wide Compatibility: Designed for Momcozy’s latest models—Momcozy Air1/W1/M9/M6/M5 wearable breast pump and Momcozy V1 Pro/V2/V1 hand-free breast pump. High Quality, Safe & Comfortable: Crafted from food-grade silicone material, our BPA-free flange insert kits provide peace of mind for new mothers.