6PCS Duckbill Valves Compatible with Momcozy M5/M6 Wearable Breast Pump, Replacement Pump Parts Accessories Compatible for V2 Pro/V1 Pro Hands Free Breast Pump Parts, Not Original Mom Cozy Accessories

Fit perfectly in the Momcozy M5 wearable pump, which was what I needed. Glad it came with 4, 2 sets.

Works great with momcozy

Bought these for a trip to Disneyland. My first pump was midday and I got an impressive 160ml from one boob in the full 30min session. Normally I’d get maybe 120-130. Really impressed. I also really love the carrying case and presentation. Very nice quality

This does not fit well in momcozy m5. It needs to be pushed hard to fit in.

These have a layer that goes inside the pump preventing them from moving around or falling out of the pump easily. I actually went back and bought another pack of a different size. Quality is great

Worked nicely until it doesn’t, the pump stopped working after few months

Bought these as a replacement for my MomCozy M5 and they fit well. This price makes it easy to replace them as recommended by manufacture.

As others have commented, there is a gap between the motor and the collector cup. This gap matters! The seal needs to be completely shut or the pump will not supply enough suction, causing the amount of milk you collect to be inconsistent and it will never fully empty you. The Momcozy M5 has been amazing for me for 10 weeks, but this off-brand is not cutting it. It works, but not how it should. If you're in a bind, get this. If you can afford the official momcozy replacement pieces, don't get this. These will be my back ups, because they do work when I need to release pain from being engorged, but not as well as they do when I have the actual pieces by momcozy.