Durceler 16mm Silicone Flange Inserts for 24/25mm Shields – Reduce Nipple Tunnel

Overview

Durceler 16mm silicone flange inserts are designed to help adapt larger 24 and 25 mm shields to a slimmer nipple tunnel. Crafted from BPA free silicone, these inserts sit inside the shield to create a snug 16 mm opening, encouraging a comfortable pumping experience. They are easy to squeeze into place and work with a wide range of popular brands, including Medela, Spectra, Elvie, and Freemie compatible options.

Why choose a smaller tunnel

Many parents appreciate the option to tailor shield fit for comfort and efficiency. A well matched tunnel can support a steadier pumping rhythm and help reduce rubbing or irritation during longer sessions. While results vary, users may notice a smoother fit when the tunnel aligns more closely with their nipple diameter after pumping.

Key benefits

• Versatile compatibility with Medela, Spectra, Elvie, Rainyb, S18 S21 S23, Momcozy S9 Pro S10 S12 Pro, TSRETE, Bellababy, NCVI 24 mm shields, and Freemie 25 mm cups
• BPA free silicone construction offers durability and comfort for repeated use
• Designed to help align nipple tunnels for small-nippled users with larger shields
• Maintains compatibility with most hands-free bras for discreet pumping

Usage tips

• Before pumping, measure nipple base to assess fit; suitable for nipple diameters around 14–15 mm after a session
• During setup, gently squeeze the insert into the shield to achieve a snug 16 mm tunnel

Care and compatibility

Durceler inserts are BPA free silicone and designed for everyday use. They slip inside many standard 24 or 25 mm shields to provide a flexible, comfortable fit, and they can be used with most hands-free bra configurations for a discreet pumping setup. For best results, handle with clean hands and sanitize between uses.

Brand assurance

Durceler focuses on practical accessories that fit a broad spectrum of breast pump systems. These 16 mm inserts offer a simple way to adapt your existing shields without purchasing new hardware, supporting a flexible, user-centered pumping routine.