Durceler 22mm Silicone Inserts — Compatible with Medela, Spectra, Elvie, Freemie Shields

Overview

Durceler 22mm silicone inserts are designed to adapt 24mm or 25mm breast shields to a narrower tunnel, delivering a softer, more secure seal during pumping. Each pack contains 2 pieces, crafted from BPA free silicone that stays clear and durable over time. This simple upgrade can help tailor fit without changing your pump setup.

Why choose these inserts

Built for broad compatibility, these inserts work with a wide range of shield brands and models, including Medela, Spectra, Elvie, S18 S21 and S23, Momcozy S9 Pro and S10 S12 Pro, TSRETE, Bellababy, NCVI, and Freemie 25mm cups when used with the 22mm option. They provide a practical way to fine tune the tunnel so the shield and nipple base align more snugly for many users.

• Adjust shields from 24mm to 22mm to create a more tailored tunnel and seal.
• Compatible with Freemie 25mm cups to reduce the opening to 22mm for a cohesive fit.

Who benefits

If you wear a larger shield but have a smaller nipple base, these inserts can help create a comfortable, secure seal without switching shields. They pair well with handsfree bra setups, letting you continue using your preferred system across sessions.

Before pumping, you can estimate fit by checking nipple base diameter and surrounding tunnel measurements. A typical guideline suggests a nipple base around 20 to 21 mm, or circumference roughly 56.5 to 62.8 mm, to gauge suitability for 22 mm adjustment.

• Ideal for users with large shields seeking a more precise tunnel alignment.
• Supports a comfortable pumping experience across multiple brands and models.

Care and replacement

Replace every 4 to 12 weeks depending on how often you pump. The inserts are BPA free, durable, and easy to clean between sessions.

Usage tips

To achieve the best fit, gently squeeze the insert during placement to seat it inside the shield and achieve a secure, smooth seal.