Trymall Flange Inserts 13–21mm (5pcs) for Medela/Spectra 24mm Shields – Wearable Pump Compatibility

Size matters when you’re pumping, and the right flange insert can make a noticeable difference in comfort and efficiency. Trymall Flange Inserts come in five common sizes—13, 15, 17, 19, and 21 mm—so you can dial in a fit that aligns with your body and your 24 mm shield system. Made from BPA-free, food-grade silicone, they’re designed to be easy to clean and durable for daily use, and they’re shaped to feel gentle against the skin as you pump.

Find your best fit

Choosing the right size matters because a snug, comfortable seal helps you maintain a steady pumping rhythm without pinching or tugging. The inserts are designed to work with a broad range of 24 mm shields across popular brands, and they can help you explore different sizing options without changing your pump hardware.

• What’s included: 5 flange inserts in sizes 13 mm, 15 mm, 17 mm, 19 mm, and 21 mm.
• Compatibility: Works with Medela PersonalFit 24 mm shields, Spectra 24 mm flanges, Willow 24 mm shields, Momcozy S9/S9Pro/S12/S12Pro wearable cups, and other 24–25 mm setups.

Versatile compatibility you can count on

The replacement parts are designed for the 24 mm family of cups and flanges and may fit other brands with similar 24–25 mm interfaces. They’re not intended for 27 mm shields, so you can avoid mismatches by sticking to the included range. This flexibility can be especially helpful if you’re swapping between pumps or experimenting with a different shield profile for the day.

• Multi-brand support: TSRETE, CPPSLEE, Momcozy, and many other brands with 24 mm interfaces.
• Broad model reach: Suitable for a variety of wearable pumps in the 24 mm category.

Care, cleaning, and replacement guidance

The inserts are BPA-free and made from food-grade silicone, which cleans quickly and dries clear. For best results, replace worn inserts every one to two months or as you notice changes in comfort or fit. Regular inspection helps you keep a comfortable pumping experience.

Practical tips for choosing and using your inserts

Begin with the mid-range size, such as 15–17 mm, and observe how your nipple sits within the shield during pumping. If you notice pressure points, try a smaller size; if there’s extra space or tugging, try a larger size. The goal is a smooth seal that feels natural without pain or constriction.

Note: This product is designed to support a comfortable fit with compatible 24 mm systems and is not a universal 24–27 mm solution. Always match the size to your equipment and comfort needs.