Universal Compatibility: These silicone flange inserts are versatile breast pump accessories, specifically designed to work seamlessly with 24mm Hands-Free breast pump shields. They are suitable for use with most wearable breast pumps (except for the 27mm shield). Compatible with Momcozy S9/S9 Pro/S10/S12/S12 Pro/TSRETE/Medela/Spectra/Opnmina/Elvie/Willow/Bellaaby/Motif Luna/Ameda/MOMMED/MYA/Ainsir/Phanpy/Lulia/NaNaLazy/Luxlady/kidzio/eulumap/Teexin/Fisroa/KISSBOBO/Goldeep/BIOBOO/Mumeasy/Nanawaw | Multiple Size Options: Choose from our variety of flange sizes to cater to your specific needs. We offer options like 6PCS: 13/15/17/19/21 or 8PCS: 13/15/17/19, allowing you to select the perfect size for a comfortable and efficient breast pumping experience. Each combination provides a different level of comfort and efficiency, ensuring smooth breast milk extraction. | Safe and Hygienic: Crafted from transparent food-grade silicone material, our flange inserts are free from BPA, ensuring safety for both you and your baby. These inserts are easy to clean and can be conveniently sanitized using methods like water steam, boiling water, or microwave-steam bags before use, maintaining a high level of hygiene. | Gentle and Comfortable: The soft-touch silicone material of these flange inserts ensures a snug and comfortable fit, making pumping efficient and preventing nipple damage or irritation. This design promotes a comfortable and pain-free experience, prioritizing your comfort. | Customer-Centric Service: Your satisfaction is our priority. If you encounter any issues or are not completely satisfied with your purchase, please reach out to our dedicated customer service team. We are committed to providing you with the best solution and ensuring a positive experience with our products. Your peace of mind is our goal.