FSA/HSA is eligible. The authentic Momcozy wearable breast pump 15mm flange insert is only suitable for use with Momcozy V1 Pro/V2 Pro/V1/V2. Original breast pump accessories. Made of food-grade silicone material. All Momcozy pump parts give you peace of mind about your baby's milk. Easy & convenient. The tubing as a washable part can be wiped clean with a damp cloth or pump wipes if dirty. According to your needs choose the tubing for single pumping or double pumping. Momcozy V1 Pro/V2 Pro wearable breast pump tubing is one of the accessories needed to ensure optimal performance for your V1 Pro/V2 Pro breast pump. You can view the linked picture and easily connect it to your motor and milk collector. Made for moms, by moms. We've committed our lives to providing the best breast pumps, accessories, education, and customer care that we can, supporting every mother with the beauty of parenthood. Meeting moms pump wherever without hassle needs. Momcozy orginal replacements are designed only for use with Momcozy V1 Pro/V2 Pro/V1/V2. It can sometimes be difficult to know what size flange insert you are. Your flange size has nothing to do with your breast size, you can use the picture guide on the link to measure the best flange size for you, which can help you improve the efficiency and comfort of breastfeeding. Some mothers experience nipple swelling while expressing, so it is important to observe the appearance of your nipple during pumping. The size of the flange is very important for comfortable and efficient pumping. Your nipples should not feel squeezed in the flange channel when expressing. All your nipples should fit in the flange channel and be free to go in and out. If you experience any discomfort while pumping, you may not be using the right size flange and need to replace it with a new size flange. Some moms may need a different flange size on each breast, which can change over time. Therefore, it is recommended that you make a selection after accurate measurements to confirm the correct flange size.