Works With Your V1/V2 Pump. The breastmilk collection cup set as breast pump accessories compatible well with your Momcozy V1/V2 Breast Pump. A set is enough to meet the replacement needs of V1/V2 breast pump parts. Ultra-Light & Discreet. Each cup weighs just 0.26 lb and holds up to 7.8 oz, making it portable enough for moms to pump hands-free at work, at home, and on the go. Its ergonomic milk bowl fits mother's breasts perfectly, making pumping incredibly discreet, easy and comfortable. Pumping Safely. All pump parts of this collection cup set that come in contact with breast milk are BPA-free and made of food-grade silicone, ensuring the highest level of safety, giving you peace of mind about your baby's milk. Easy To Use & Clean. Momcozy Hands-Free Collection Cups include only 4 parts for easier assembly and cleaning. Each set come equipped with L-shaped adapters which can be inserted at any angle for a cozy pumping life. Correctly Measure & Choose The Right Flange Size. Your breasts may change between the third trimester and after giving birth. Also, your breasts may change through your breast pumping journey. So it's important to observe how your nipples look during a pumping session. We offer three flange size (19/21/24mm) selection to fit most moms. What's In The Set: milk collector*2, 24mm Flange*2, 21mm flange insert*2, 19mm flange insert*2, diaphragm*2, duckbill valve*2, tubing*1. Breast Pump sold separately.