will this work with bellababy?

no. for bellabay, please buy from the following https://www.amazon.com/Maymom-Compatible-Bellababy-Double-Electric/dp/B09W2KRSC5/ref=sr_1_2?crid=23GCK9QCNBTGZ&keywords=maymom%2Bbellababy&qid=1676120494&sprefix=maymom%2Bbella%2Caps%2C298&sr=8-2&th=1

Did anyone have trouble and feel like these ran big?

Yes I definitely felt these ran big as compared to standard spectra. It doesn’t make sense but 19mm was too big when it was the right size in spectra

I used mine before realizing it’s the wrong flange size, should I still return them?

I did the same thing. I just brought flange inserts that were my nipple size and just pushed it in for the correct sizing. But you can if you want.

Does this flange work with the Kiinde system?

Yes if you have the Kiinde adapters

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🍼 Upgrade your pump game with Maymom’s precision parts—because your flow deserves the best!

SAFETY FIRST - Independently lab-tested, BPA/DEHP free, FDA compliant for peace of mind
CUSTOM COMFORT - Wide-neck flange fits Avent & Maymom bottles for versatile use
EFFORTLESS MAINTENANCE - Dishwasher safe & steam-cleaning approved for busy pros
SEAMLESS COMPATIBILITY - Fits Spectra S1, S2 & 9 Plus pumps flawlessly
DURABILITY MEETS DESIGN - Duckbill valves engineered for easy plug-in and long-lasting performance

Maymom’s 18mm flange and duckbill valve set offers professional-grade compatibility with Spectra S1, S2, and 9 Plus breast pumps. Engineered for durability and ease of use, these BPA/DEHP free, FDA-compliant parts ensure safe, efficient pumping. Designed to fit wide-neck bottles including Avent and Maymom, they deliver OEM-level suction performance with added convenience for the modern multitasking parent.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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