Maymom 18mm Wide Mouth Flange for Spectra S1/S2 & 9 Plus Pumps

Upgrade your Spectra pumping setup with Maymom’s 18mm Wide Mouth Flange

The Maymom 18mm wide-mouth flange is designed as a compatible, budget-friendly replacement for Spectra S1, S2, and Spectra 9 Plus pumps. This is a Maymom replacement part, not the original Spectra flange, and not affiliated with Spectra Baby USA. The goal is to offer a fit-focused option that may help you adapt to different sessions without relying on an original part.

What you get

• Single 18mm wide-mouth flange per unit. If you pump on both sides, consider adding a second unit to reduce downtime between sides.
• Sized with nipple diameters around 16–17 mm measured after a pumping session, a common range some users report during real-life use.
• Designed as a replacement accessory for Spectra S1, S2, and Spectra 9 Plus pumps.

Compatibility and bottles

• Compatible with Spectra wide-mouth bottles, AVENT bottles, and Maymom wide-mouth bottles for flexible bottle options.
• Not compatible with other brands’ wide-mouth bottles, so please check your setup before swapping parts.

Materials, safety, and care

• BPA-free and compliant with FDA regulations for plastics that contact food.
• Top-rack dishwasher safe and suitable for steam sterilization, supporting simple cleaning routines.

Practical use and value

Use this flange to maintain pumping routines if your original part isn’t available or if you’re experimenting with fit. The 18mm size is intended to offer a comfortable feel for many users and can help you adapt to varying sessions without committing to a full brand replacement.

Tips for the best fit

• Measure nipple diameter after pumping to guide size decisions and assess comfort.
• Pair with compatible bottles to streamline transfers and reduce handling time during sessions.

Note: This is a Maymom replacement part and is not affiliated with Spectra Baby USA. It is offered as an accessible option for those evaluating fit and compatibility across bottle and flange choices.