Nenesupply 21mm Flanges – 2pc for Spectra S2/S1/9 Plus & Synergy Gold | Wide Mouth Replacement

Overview

The Nenesupply 21mm two-pack flanges are designed as a practical upgrade for your Spectra S2, S1, 9 Plus, and Synergy Gold pumping setup. This pair is a non-original Spectra part, crafted to align with the same connection points and packaging you know, while offering a reliable, easy-to-clean option. The 21mm diameter is a versatile choice that can fit a range of nipple sizes and pumping styles, helping to keep sessions comfortable and steady.

The flanges feature a wide mouth and smooth funnel edges that minimize rubbing and irritation during pumping. The internal tunnel length of about 32mm supports a comfortable reach for many users, including those with stretched nipples. With thoughtful design, these flanges are built to work with Spectra valves, backflow protectors, and bottles, and they’re also compatible with Nenesupply bottles for an integrated setup.

What you get and how it fits your system

• Contains 2 small 21mm flanges / breast shields, made by Nenesupply and designed for Spectra S2, S1, 9 Plus, and Synergy Gold.
• Wide mouth design allows interchangeability with Spectra valves, backflow protectors, and bottles; compatible with Nenesupply bottles.
• The flange funnels have smooth angles and do not rub against nipples; the 32mm tunnel length supports comfortable pumping; suitable for stretched nipples.
• Other sizes are available: 15mm, 17mm, 19mm, 21mm, 24mm, 27mm, 30mm for a customized fit.
• Dishwasher-safe on the top rack; sterilization with boiling water, steam, or microwave bags is possible; BPA-free and DEHP-free; FDA-compliant materials.
• Same suction performance as original pump parts; backflow protectors seal with the flanges to keep bottles secure.

Care, safety, and materials

• Dishwasher safe on the top rack; also suitable for boiling water or steam sterilization per guidelines.
• BPA-free and DEHP-free; complies with FDA standards for food-contact materials.
• Independently tested for safety by third-party labs, providing peace of mind about materials and build quality.

Sizing tips and fit guidance

Choosing the right size depends on comfort and pumping style. The 21mm option sits between smaller and larger diameters, offering a balance that often suits a range of users. If you’re unsure, consider testing with this size and comparing against other available sizes.

Note: This product contains two 21mm flanges and is intended as a replacement part rather than an original Spectra component.