eufy Original 21mm Breast Pump Sizing Inserts (2-Pack) | E10, E20, S1 & S1 Pro

eufy Original 21mm Breast Pump Sizing Inserts (2-Pack) – E10, E20, S1 & S1 Pro

A more personalised fit for a more comfortable pumping experience.

Make your breast pumping routine more comfortable with the eufy Original 21mm Sizing Inserts (2-Pack), designed for compatible eufy Wearable Breast Pump E10, E20, S1 and S1 Pro models.

Finding the correct flange fit is an important part of comfortable and effective breast pumping. These 21mm sizing inserts are designed to reduce the effective opening of a compatible breast pump flange, providing a more suitable fit for users who require a 21mm tunnel size.

Whether you’re adjusting your existing flange size, replacing worn inserts or keeping spare accessories available, this convenient two-pack helps you customise your wearable breast pump setup to suit your individual needs.

Designed for a More Personalised Flange Fit

Every pumping journey is different, and selecting the correct breast pump flange size can make a significant difference to comfort.

The eufy 21mm Sizing Inserts are designed to fit inside a compatible breast pump flange, reducing the effective tunnel opening to approximately 21mm.

This provides an alternative to using a larger flange opening when a smaller size is more appropriate.

Key benefits:

• Provides a 21mm flange tunnel opening when fitted correctly
• Helps customise the fit of compatible breast pump flanges
• May improve comfort when 21mm is the appropriate size
• Supports proper nipple positioning during pumping
• Offers a practical alternative to using an incorrectly sized flange opening

Compatible with eufy E10, E20, S1 & S1 Pro

These original eufy sizing inserts are intended for use with the following wearable breast pump models:

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

The inserts are designed to work with the appropriate compatible flange assembly, allowing you to adjust the effective tunnel size without replacing the complete breast pump.

Please note: Confirm that your existing flange supports the use of the 21mm sizing insert before purchasing. Compatibility with other breast pump brands or models should not be assumed.

Why Correct Flange Sizing Matters

A breast pump flange should fit comfortably around the nipple while allowing it to move appropriately during pumping.

A flange opening that is too large or too small may contribute to discomfort, rubbing or inefficient pumping.

Using a correctly sized insert can help improve the fit of a compatible flange.

Potential benefits of an appropriate flange fit include:

• Improved comfort during pumping
• Reduced unnecessary rubbing against the flange tunnel
• More suitable nipple positioning
• A more personalised pumping setup
• Greater confidence in your flange fit

Important: The correct insert size depends on your individual measurements and comfort. A 21mm insert is not automatically suitable for every user.

Understanding the 21mm Size

The 21mm measurement refers to the nominal internal tunnel size of the sizing insert.

It does not mean that the insert is necessarily suitable for a nipple measuring exactly 21mm.

Flange sizing recommendations can vary depending on nipple measurements, the manufacturer’s sizing guidance and individual comfort.

For the best fit, follow the eufy sizing guide and consult a qualified lactation professional if you experience persistent discomfort or difficulty expressing milk.

Convenient 2-Pack for Everyday Pumping

Each pack contains two original 21mm sizing inserts, making it convenient to maintain your wearable breast pump accessories.

The two-pack is particularly useful for users who operate a compatible double-pumping setup or want spare inserts available for regular use.

Ideal for:

• Adjusting compatible flanges to a 21mm tunnel size
• Replacing existing sizing inserts
• Keeping spare pumping accessories available
• Maintaining a compatible double-pumping setup
• Customising your wearable breast pump fit

Maintain Your Existing Breast Pump

Flange sizing inserts are practical accessories that allow you to adjust the fit of your existing breast pump equipment.

Rather than replacing the complete breast pump when a different flange tunnel size is required, a compatible insert may provide the adjustment you need.

The eufy Original 21mm Sizing Insert 2-Pack offers a convenient way to maintain your existing E10, E20, S1 or S1 Pro pumping system.

Comfortable Pumping Starts with the Right Fit

Breast pumping should not cause persistent pain or significant discomfort.

If you experience pinching, rubbing, swelling or nipple irritation, check that your flange and insert are correctly sized and assembled.

Using a sizing insert that is too small can also cause discomfort, so choosing the correct size is essential.

Always follow the manufacturer’s fitting recommendations and adjust your pumping setup if discomfort occurs.

Care and Cleaning

Because flange sizing inserts come into contact with the nipple and may contact expressed breast milk, appropriate cleaning is important.

Clean and maintain your inserts according to the manufacturer’s instructions.

Recommended care:

• Wash your hands before handling the inserts
• Clean before first use according to the manufacturer’s instructions
• Clean after pumping as recommended
• Follow approved sanitising procedures
• Inspect regularly for tears, distortion or deterioration
• Avoid stretching or damaging the inserts during cleaning
• Allow components to dry as instructed before storage
• Replace damaged or worn inserts

Key Features

• Original eufy breast pump sizing inserts
• 21mm nominal tunnel size
• Convenient 2-pack
• Compatible with eufy Wearable Breast Pump E10
• Compatible with eufy Wearable Breast Pump E20
• Compatible with eufy Wearable Breast Pump S1
• Compatible with eufy Wearable Breast Pump S1 Pro
• Designed to reduce the effective opening of a compatible flange
• Supports a more personalised pumping fit
• Practical replacement or spare accessories
• Breast pump and flanges sold separately

Technical Specifications

What’s in the Box?

• 2 × eufy Original 21mm Breast Pump Sizing Inserts

Please note: This product contains two sizing inserts only. Breast pumps, flanges, milk collection containers, charging accessories and other components are not included.

How to Use Your 21mm Sizing Inserts

1. Confirm that your breast pump is a compatible eufy E10, E20, S1 or S1 Pro model.
2. Check the manufacturer’s flange sizing guide to confirm that a 21mm insert is appropriate for you.
3. Wash your hands before handling the inserts.
4. Clean the inserts according to the manufacturer’s instructions.
5. Ensure your existing breast pump flange is compatible with the inserts.
6. Place the sizing insert into the flange according to the manufacturer’s assembly instructions.
7. Check that the insert is correctly seated and securely positioned.
8. Position the breast pump so that your nipple is centred within the insert opening.
9. Begin pumping at a comfortable setting and check for rubbing, pinching or discomfort.
10. After pumping, remove and clean the inserts according to the manufacturer’s instructions.

Important Care and Safety Information

• Use only with compatible eufy wearable breast pump flange assemblies.
• Confirm that 21mm is the appropriate size before use.
• Do not use inserts that cause persistent pain, pinching or excessive rubbing.
• Follow the manufacturer’s fitting and assembly instructions.
• Inspect regularly for cracks, tears or distortion.
• Replace damaged or deteriorated inserts.
• Do not use cleaning methods or temperatures not approved by the manufacturer.
• Stop pumping and seek professional advice if persistent discomfort or injury occurs.
• Keep small components out of reach of children.

Find Your Fit with eufy

The eufy Original 21mm Sizing Insert (2-Pack) provides a practical way to customise compatible eufy E10, E20, S1 and S1 Pro wearable breast pump flanges.

With two original 21mm inserts included, you can maintain your pumping accessories while working towards a more comfortable and personalised flange fit.

Find the right fit for your pumping routine with eufy accessories from mUther.

E&OE.