Nuliie 12PCS Silicone Flange Inserts — 17/19/21mm Sizing Kit for 24mm Breast Pump Shields

Tailored pumping comfort and compatibility

The Nuliie 12PCS flange inserts kit helps you customize your 24mm shield setup with soft, flexible silicone fittings. This sizing kit includes 12 pieces across five sizes, including 17, 19, and 21 mm options, designed to adapt to a range of shield configurations. By refining the fit, you can approach a more comfortable pumping experience and reduce abrupt seal gaps during use.

What’s inside and how it helps

• 12 silicone inserts in five sizes, including 17, 19, and 21 mm, to address common shield configurations
• Soft and flexible silicone provides a gentle, secure fit that adapts to your pumping routine
• Designed to work with most 24 mm electric and manual wearable pumps

Note that the kit is not compatible with 27–28 mm shields, so matching your shield size first remains important. The goal is to help you find a smoother pumping rhythm and better seal without forcing a rigid fit.

Safety, care, and cleaning

• Made from food-grade liquid silicone and BPA-free for everyday use
• Dishwasher safe for quick cleaning between sessions, plus a complimentary cleaning brush included
• Prompt washing after each use and replacement every two months recommended to maintain performance

Support and practical use

• Includes a free nipple measurement ruler to help you choose the best size for your needs
• Customer support is available to answer questions and assist with sizing decisions anytime
• As nipple size can vary across breastfeeding stages, the kit’s variety helps you adapt as needed

Real-world benefits to consider

While results vary, many users report a more comfortable fit, a steadier seal during pumping, and easier maintenance when switching sizes. This kit is presented as a practical way to tailor your pumping setup to your evolving needs, rather than a guaranteed outcome.