Mompmuir 20mm Silicone Flange Inserts – Compatible with Elvie Stride, Lansinoh, Medela, Spectra & More

Overview

Meet the Mompmuir 20mm silicone flange inserts, designed to broaden the fit for a wide range of popular breast pump shields. By reducing the nipple tunnel from a common 24–25mm shield to about 20mm, these inserts offer a closer, more comfortable feel during pumping—without changing the suction performance of your pump.

Why choose 20mm inserts?

• Two-level taper design supports milk flow with less risk of blockage, helping maintain steady suction.
• Soft silicone provides a gentle, skin-friendly touch for longer pumping sessions.
• Broad brand compatibility, including Elvie Stride, Lansinoh, Medela, Spectra, Momcozy, and more.

What you get

• 2 pieces per pack
• Second-generation design for an improved fit and easy installation
• Available in sizes spanning 15–22 mm to match varying needs

Size guidance and fit

Before pumping, measure nipple diameter (about 16–17 mm) or circumference (roughly 50.25–53.38 mm) to choose the right size. The 20 mm insert is a common choice for those using 24–25 mm shields seeking a tighter tunnel.

Materials and safety

Constructed from soft, food-grade silicone, these inserts are BPA- and DEHP-free. They’re designed to preserve suction parallel to original pump parts and are easy to install and remove.

Care and cleaning

• Boiling water safe
• Steam safe
• Top-rack dishwasher safe
• Dishwasher-safe, seamless design for straightforward cleaning

Real-world use and scenarios

Ideal for caregivers who mix shield brands or travel, these inserts offer a practical adjustment for a snug, comfortable fit. They present a potential way to tailor your setup rather than promising a guaranteed outcome.

Installation tips

Remove the shield, insert the 20mm piece into the tunnel, reseat the shield, and test suction. The two-level taper aims to support steady milk flow while keeping the pump’s performance consistent.

Compatibility note

Designed for broad compatibility across many pump models, the inserts work with a variety of shield brands. Performance depends on your specific pump and shield pairing.