Nenesupply 21mm 2pc Flanges for Spectra S2/S1/9 Plus & Synergy Gold

Two 21mm Flanges Ready to Upgrade Your Pump Setup

The Nenesupply 21mm two-pack offers a practical, compatible alternative for daily pumping. Crafted to work with Spectra S2, S1, 9 Plus, and Synergy Gold pumps, these flanges provide a wide-mouth design and smooth internal angles that feel comfortable during sessions. They are not original Spectra S2 parts, but they’re designed to align with common Spectra accessories for a cohesive pumping experience.

These flanges emphasize user-friendly materials and construction. They’re built to pair with Spectra valves, backflow protectors, and bottles, and they also fit Nenesupply bottles. If you’re stocking spare parts or exploring a slightly different fit, this 2-pack is designed to slip into your routine with minimal friction.

What’s Included and How It Works

• Two 21mm flanges (breastshields) made by Nenesupply
• Wide-mouth compatibility with Spectra valves, backflow protectors, and bottles

The flange funnels feature smooth angles that minimize rubbing, aiming to support comfortable pumping sessions. The flange tunnel measures about 32mm, making it suitable for stretched nipples and a range of sizes. A full set of sizes (including 15mm, 17mm, 19mm, 21mm, 24mm, 27mm, and 30mm) is available for broader compatibility.

Care, Safety, and Compatibility

• Dishwasher-safe on the top rack and compatible with boiling water or microwavable sterilization methods
• BPA Free, DEHP Free, and FDA-regulated for safe-contact materials
• Independent lab testing confirms safety compatibility with typical pump accessories
• Backflow protectors seal securely to form an airtight connection with bottles
• Same suction performance as original pump parts, offering a familiar pumping feel

These flanges are designed to be interoperable across several Spectra models and the Synergy Gold system, giving you a versatile option without locking you into a single brand. If you’re balancing comfort, compatibility, and material safety, this pair provides a practical, non-committal path to try a new fit.

Care Tips and Real-World Use

For best results, ensure a clean, dry surface after washing and follow your pump manufacturer’s sterilization guidelines. The combination of wide-mouth compatibility and smooth internal geometry is intended to support stable pumping sessions in day-to-day routines, whether at home or on the go.