Nenesupply 2nd Gen 21mm Flange Inserts - 6pc, 24mm to 21mm Compatibility with Elvie, Willow, Spectra

Nenesupply 2nd Generation 21mm Flange Inserts

The Nenesupply 2nd Generation 21mm Flange Inserts offer a flexible way to tailor flange fit across popular breast pump brands. This 6-piece set is designed to reduce 24mm flanges to 21mm, helping you customize your pumping experience without swapping hardware. Built with safety and ease in mind, these inserts are intended to complement your existing pump parts while maintaining compatibility with a wide range of models.

Real-world pumping often requires adjustments for comfort and efficiency. The 21mm option is part of a broader family that includes 15, 17, 19, and 21mm sizes, giving you the freedom to experiment with what feels best on any given day. While results can vary, a snug, well-supported fit may contribute to a steadier rhythm and more comfortable sessions over time.

What’s inside the 6pc set

• 6 silicone flange inserts in 21mm size
• Compatibility with 24mm flanges from Elvie, Willow, Spectra, Momcozy and more
• 2nd generation silicone for a smooth, soft feel
• Smooth angle designed to support a natural pumping motion
• Reduces 24mm to a 21mm profile for flexible fit
• Dishwasher safe on the top rack
• BPA and DEHP free; EU and USA safety compliance

Key advantages in daily use

• Easy to install and remove, enabling quick fit adjustments during sessions
• Embedded sealing circles help maintain a complete seal and minimize leaks
• Soft silicone and a smooth angle can contribute to a more comfortable pumping feel
• Broad pump compatibility allows you to use existing 24mm flanges with confidence

Care, safety, and compliance

These inserts are BPA-free and DEHP-free, designed for safe contact with parts that touch feed tubing and milk storage. They are dishwasher safe on the top rack for easy cleanup and comply with relevant EU and US material regulations. Independent lab testing supports quality and safety, helping you pump with peace of mind.

Note: This accessory does not alter pump performance guarantees and is intended as a sizing option to improve comfort and fit. If you experience persistent discomfort, consider trying a different size within the same line (15, 17, 19, 21mm) to find your best match.