Nenesupply 21mm Flange Insert — 24mm to 21mm Reduction for Elvie, Medela, Spectra, Willow & More

Meet the NENESUPPLY 21mm Flange Insert

The NENESUPPLY 21mm Flange Insert is a practical two piece silicone solution that lets you adapt standard 24mm flanges to a comfortable 21mm diameter. Designed for flexibility, it works with popular pumps and brands such as Elvie, Elvie Stride, Medela, Momcozy, Spectra, Willow, Willow Go, and Motif Luna. By shrinking the opening, you can tailor the fit without buying new flanges, keeping your pumping setup versatile and ready for everyday use.

Compatible pumps and size options

This insert is built to work with 24mm flanges from a wide range of pumps. It is also available in multiple sizes to match how you pump in real life, including 15, 17, 19, and 21mm options. The soft silicone construction enhances comfort while preserving a practical fit across brands.

• 2 piece 21mm silicone flange insert set
• Compatible with 24mm flanges from Elvie, Elvie Stride, Momcozy, Medela, Spectra, Willow, Willow Go and Motif Luna
• Available in 15, 17, 19, and 21mm to accommodate different needs
• Soft silicone for comfortable pumping and a closer fit for smaller nipples
• Reduces the flange funnel from 24mm to 21mm while maintaining a secure seal
• Embedded sealing circles help create a complete seal and steady suction
• Easy to install and remove for quick adjustments
• Dishwasher safe on the top rack; BPA and DEHP free; EU and US safety standards tested

In real world use, a smaller 21mm opening can feel more natural for some users, especially when switching among compatible pumps. The design aims to support comfort without compromising performance, helping you make the most of your existing flanges.

Usage tips and care

• Choose the size that matches your flange and try the insert with your usual routine
• Install before pumping and remove after to inspect fit and seal
• Clean after use; top rack dishwasher cleaning is recommended
• Ensure the sealing circles are properly seated to maintain a seal

Care and safety notes emphasize that the insert is a compatible accessory designed to expand your pump options. It adheres to EU and US material safety guidelines and is free from BPA and DEHP, offering a practical and low risk way to tailor your flange setup. While results may vary by user and pump model, many find that the 21mm option can be a helpful addition to their pumping toolkit.