Hranio 21mm Breast Pump Flange Inserts — 8-Pack BPA-Free Silicone

Overview

Meet the Hranio 21mm Breast Pump Flange Inserts, an 8‑pack of silicone inserts designed to adapt 24mm shields to a precise 21mm opening. Made from BPA‑free, food‑grade silicone, these inserts come into contact with milk in a way that feels gentle to the skin and easy to clean. The material’s soft, smooth texture and well‑finished edges contribute to a calm pumping routine without harsh surfaces or rough spots.

Design and compatibility

The 21mm inserts narrow the shield tunnel from 24mm to 21mm, aiming for a tighter seal and a more comfortable pumping feel. The shorter bottom design helps prevent blockages and supports steady suction across sessions. These inserts are designed to work with a wide range of pumps that use 24mm shields, including Momcozy M5 and M9, S12 Pro, Spectra, Medela, Elvie, Lansinoh, Eufy, and many others.

Key features

• Eight 21mm flange inserts in each kit
• Food-grade silicone; BPA-free and milk‑contact‑safe
• Compatibility with most 24mm shield pumps
• Enhanced seal potential with a tighter 21mm opening
• Shorter bottom design to reduce blockage and support suction
• Easy cleaning: warm soapy water; safe to sterilize at ≤100°C

Care and cleaning

After pumping, wash inserts with warm, soapy water and rinse thoroughly. For deeper cleaning or sanitizing, you can heat the inserts to ≤100°C (212°F) for 5–10 minutes.

Real-world use cases

• Adapt multiple pumps without buying new shields
• Maintain a comfortable seal during varied suction levels

Choosing the right size

Size matters for comfort and efficiency. If you notice rubbing or squeezing, consider trying a different insert size to find a better fit for your nipple and pumping rhythm.