Nuliie 10PCS Flange Inserts (13/15/17/19/21mm) for 24mm Breast Pumps

What it is and what it solves

The Nuliie flange inserts come as a 10-pack with sizes 13, 15, 17, 19 and 21mm, designed to fit most 24mm wearable breast pumps. They’re intended to reduce the nipple tunnel to the correct size, helping to support more comfortable pumping sessions when the shield is too large. It’s important to note that they are not compatible with 27–28mm shields. If you’re aiming to tailor fit and comfort during pumping, these inserts offer a pragmatic option without changing your pump hardware.

How it works in practice

On paper, the idea is simple: the inserts sit inside the 24mm shield to bring the opening down to a more comfortable diameter for different nipple sizes. The silicone material is soft and food-grade, with BPA-free safety in mind. The set also includes a practical nod to maintenance — the inserts are dishwasher safe and designed for easy cleaning after use. For ongoing reassurance, a free nipple measurement card is provided to help you identify the best size for future sessions.

What stands out (pros)

• Wide size range: 13–21mm in a single pack helps you experiment with a comfortable fit without purchasing multiple separate sets.
• Compatibility focus: Designed to work with most 24mm shields, a common size for wearable pumps.
• Safety and cleaning: Made from BPA-free silicone and described as easy to clean, dishwasher safe.
• Supportive extras: Includes a nipple sizing card and a free replacement option if the size isn’t right after purchase.

Limitations and things to consider (cons)

• Not compatible with 27–28mm shields, which means you may need a different accessory if your pump uses that shield size.
• Effectiveness depends on individual fit, if you already have a comfortable shield size, the benefit of changing inserts may be marginal.
• Replacement guidance suggests renewing every 2 months to maintain performance, which adds to ongoing costs.

Who it’s for

• Mothers who use a 24mm wearable breast pump and need more options to adjust fit for comfort and potentially better milk flow.
• Caregivers or partners helping with pumping who want a flexible, multi-size solution without buying multiple separate inserts.
• Those who value practical extras (sizing card, cleaning brush) included with the product.

Who it’s not ideal for

• If your pump uses shields outside the 24mm range or you know your exact size already, these inserts may offer limited additional value.
• If you require a guaranteed 27–28mm shield compatibility, you’ll need to look elsewhere.

When it makes sense to buy

• You’re unsure about your exact nipple size and want a single pack that covers several common sizes.
• You experience discomfort with a fixed 24mm shield and want to experiment with fit to potentially improve comfort and pumping efficiency.
• You value a kit that includes extras like a nipple sizing card and a replacement option, which reduces guesswork.

Before you buy: practical checks

• Confirm your pump’s shield size is 24mm, since inserts target that diameter.
• Consider your usual pumping goals (comfort, speed, output) and whether a better fit via inserts could help without upgrading the whole shield.
• Be aware of the maintenance routine: clean promptly after each use and follow the recommended replacement window to sustain performance.

Practical usage example

Imagine you’re pumping during a busy morning and find the 24mm shield a touch wide for a comfortable seal. You try the 13–15mm inserts to reduce the tunnel and notice less pressure around sensitive areas, potentially easing discomfort. With the sizing card on hand, you can quickly reassess after a session and decide if another size fits better for next time.

What to consider when comparing alternatives

• If you know your exact nipple size and are confident with your current shield, a slimmed-down upgrade might not justify the cost. In such cases, sticking with one shield size and its official accessories could be simpler.
• Other solutions may include buying a different shield size altogether, but that involves committing to a single fit rather than a spectrum of options.

Is it worth it?

Final decision

This set is worth considering if you value flexibility and want to experiment with fit around a common 24mm shield. It is less compelling if you already know your precise size and are settled with your current shield, or if your pump uses larger shields not supported by these inserts. A practical option for occasional adjustments and for those who appreciate added convenience (sizing card and replacement option) in a single purchase.

FAQ

• Do these inserts fit all 24mm shield models? They are designed to fit most 24mm wearable pumps, but check your specific model’s compatibility if you’re unsure.
• How often should I replace the inserts? The guidance suggests replacing every 2 months to maintain optimal functionality.
• Are they safe to wash in a dishwasher? Yes, the silicone is described as dishwasher safe and BPA free.