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Features & Benefits:
Sized for performance: With a 17 mm internal diameter, these flanges are for those aiming to down-size from larger flanges for better drainage and comfort.
Enhanced comfort + fit: A better-fitted flange helps reduce nipple movement inside the tunnel, minimizes friction, and supports more consistent milk removal. Flange fit plays a key role in pumping efficiency and comfort.
Compatible with Spectra systems: Built to align with Spectra’s flange interface—so you don’t need to reinvent your setup, just swap the size.
Pack of two for convenience: Two flanges in the set mean you can keep one at your pumping station and one in your bag—or rotate them for cleanliness and backup.
BPA-/DEHP-free material: Designed with safe materials for breast-milk contact and daily use.
Who It’s For:
Ideal for pumping parents who:
Feel their current flange is too large (pocketing air, aren’t getting full drainage, or have more areola movement).
Are experiencing slower output and suspect it's due to a loose fit.
Wear a size that comfortably fits within the 17-mm specification and who want an optimized, comfortable session.
Use Spectra S-series pumps and want a minimal-gear change-out for better comfort and performance.
Product Details:
Size: 17 mm internal rim diameter.
Pack: Two flanges included.
Material: Safe for breastmilk contact; designed for cleaning, sterilization, and regular use.
Compatible With: Spectra S1, S2, 9+ (and possibly other pumps supporting the same flange connection) – double check your pump’s flange threading/interface.
Care Instructions: Clean thoroughly after each use, inspect for cracks or wear, and replace if any damage appears. Refer to your pump’s user manual or flange sizing guide.
Why Choose This Over “Standard” Flanges:
Standard flange sizes often aim for “one-fits-many”, but your fit really matters. Poor fit can lead to reduced milk flow, nipple discomfort, or inefficient drainage. These 17 mm flanges give you a targeted size choice—less guesswork, more comfort, and potentially better output. If you’ve been accepting a “just okay” fit, this upgrade can change your pumping game.
Make your pumping gear work with your body, not against it—choose the 17 mm Spectra Flanges 2-Pack and step into better fit, comfort, and performance.
Not sure about your correct flange size? Make an appointment with Bonnie Knows Breast!