Durceler 17mm Silicone Flange Inserts – Reduce Nipple Tunnel to 17mm for Medela, Spectra, Elvie, Freemie & More

Find Your Ideal Pump Fit with Durceler 17mm Silicone Flange Inserts

Durceler 17mm silicone flange inserts slip inside 24mm or 25mm shields to create a narrower nipple tunnel. This helps align the tunnel with smaller nipples while preserving compatibility with a wide range of shield systems and brands you may already use.

Crafted from BPA-free silicone, these inserts are clear, durable, and soft to the touch, making daily pumping more comfortable. They work with many popular brands and can be used with most hands-free bra configurations when inserted inside the shield, offering a practical way to optimize your pump setup without changing your existing equipment.

Key benefits and compatibility

• Reduces the nipple tunnel from 24–25mm to 17mm, creating a tailored, comfortable fit for smaller nipples.
• Works with Medela, Spectra, Elvie, S18/S21, Momcozy S9/S12, TSRETE shields, and Freemie 25mm cups.
• BPA-free silicone that is durable, clear, and comfortable for regular use.
• Maintains compatibility with most hands-free bra setups; a gentle squeeze helps ensure a snug fit during pumping.

Fit, measurements, and usage tips

• For best results, aim for a nipple base circumference of about 37.68–43.96 mm before pumping.
• Post-pumping nipple diameter typically 14–16 mm, which can guide your fit decisions.
• Insert slightly and gently squeeze to seat the insert inside the shield for optimal performance.

Care and ongoing use

Rinse after pumping and wash with warm, mild soap. Air-dry completely before reusing. Store away from sharp edges to protect the silicone’s clarity and shape.

Practical notes

These inserts enhance comfort and shield efficiency without altering your shield brand. They are designed as an adaptable accessory, with results varying by individual pumping dynamics and shield setup.

Real-life scenarios

During long pumping sessions, night-time use, or travel with mixed shields, the 17mm insert helps preserve a secure fit and comfortable feel across different brands and cup configurations. Consider them as a flexible option to dial in your personal pumping comfort.