eufy Sizing Insert for Breast Pump E10/E20/S1/S1 Pro (2-Pack)

Find A More Precise Breast Pump Fit

eufy Breast Pump Sizing Inserts, available at Fed is Best, fit inside a compatible eufy breast pump flange to reduce the tunnel opening. They provide additional sizing options when the standard flange opening is too large, helping you achieve a more precise and comfortable pumping fit.

Made from soft, food-grade silicone, the inserts are available in 17mm, 19mm and 21mm sizes. Each selected size comes as a 2-pack.

Why Flange Fit Matters

Correct flange sizing plays an important role in both pumping comfort and performance. During pumping, your nipple should move freely within the flange tunnel without excessive rubbing. In addition, too much surrounding breast tissue should not be pulled into the tunnel.

A sizing insert reduces the diameter of the existing flange opening rather than replacing the entire flange. This allows you to customise the fit of your compatible eufy pump with a smaller tunnel size.

Choose Your Insert Size

These eufy Sizing Inserts are available in three sizes:

• 17mm
• 19mm
• 21mm

Choose the variation that corresponds with your required flange fit. If your pumping fit changes over time, measure again rather than assuming that your previous size is still suitable.

Key Features

• Breast pump flange sizing inserts
• Reduce the flange tunnel opening for a more precise fit
• Available in 17mm, 19mm and 21mm sizes
• Made from soft, food-grade silicone
• Designed to support comfortable nipple movement during pumping
• Compatible with multiple eufy wearable breast pumps
• Each selected size is supplied as a 2-pack

Compatibility

These sizing inserts are designed for use with compatible flanges for:

• eufy Breast Pump E10
• eufy Breast Pump E20
• eufy Breast Pump S1
• eufy Breast Pump S1 Pro

Care And Replacement

Regularly inspect your sizing inserts for wear, stretching or damage. Small silicone pump parts can change with repeated use and sterilisation, which may eventually affect their fit or pumping performance.

The supplier recommends replacing the sizing inserts every 1–2 months. However, replace them sooner if you notice damage, wear or a change in fit or performance.

It is also worth rechecking your nipple measurement if pumping becomes uncomfortable or your usual flange fit no longer feels right.

What’s In The Box

Each selected variation contains:

• 2 x eufy Breast Pump Sizing Inserts in your chosen size

eufy Breast Pump Sizing Inserts offer a simple way to customise the fit of your compatible wearable pump without changing the entire flange. Choose from 17mm, 19mm or 21mm, available at Fed is Best.