Durceler 21mm Silicone Flange Inserts – 24/25mm Shields to 21mm Fit (2pc)

Durceler 21mm Silicone Flange Inserts — tailored fit for 24mm/25mm shields

Durceler offers a practical silicone solution that adapts large shields to a 21mm inner tunnel. By sliding these 21mm inserts into compatible shield cups (including Medela, Spectra, Elvie, Freemie, and various 24–25mm models), you can create a more comfortable, individualized pumping experience.

The 2-piece pack prioritizes value and readiness—keep a spare on hand for quick swaps or travel, so you can maintain your preferred pumping setup without changing shields.

Why the fit matters

When shield outer diameters exceed the nipple size, a properly sized tunnel can reduce rubbing and pressure points. The Durceler inserts are designed for users with nipple diameters that may be smaller than the shield opening, helping you maintain a secure seal and steady flow across sessions.

• Broad compatibility: Works with a wide range of brands and models, including Medela, Spectra, Elvie, and Freemie shields.
• Material you can trust: BPA-free silicone that stays durable and clear through repeated use.
• Handsfree bra integration: Keeps your existing handsfree bra setups functional, with the insert inside the shield.
• Easy to fit: A gentle squeeze during insertion helps the insert seat correctly for a snug, consistent tunnel.

How to measure and set up

Before pumping, confirm the base circumference of your nipple area sits around 50.24–56.52 mm. After a pumping session, you may find nipple diameters in the 18–20 mm range. If your shield is 24–25 mm, the 21mm insert can help tailor the tunnel to your anatomy.

• Measure and compare: Use a ruler or tape to estimate circumference and diameter to guide fit.
• Insertion tips: Lightly squeeze the shield as you seat the insert to achieve the best seal and alignment.

Ideal for busy mornings, travel, or daycare pumping, the insert reduces fuss by letting you keep your large shield while dialing in a comfortable tunnel. The result is a calmer pumping feel, less irritation, and a cleaner seal that helps prevent leaks during motion or while reclined.

Whether you’re optimizing from a primary shield choice or adapting a handsfree setup, this insert offers an adjustable, non-permanent option to explore fit variations. While results will vary, many users report a more comfortable sensation and a steadier pumping rhythm when the tunnel aligns well with their nipple size and shield.