Feature:1. Breastpump Parts: Our breastpump part set includes 2pcs Backflow Protectors and 2pcs silicone Tubings, it is compatible for S1 S2 9 Plus breastpump backflow protectors and tubings.2. Compatibility: Backflow protectors are compatible with for S1, for S2, for 9 Plus breastpumps,ensuring a great fit and reliable performance each time. Good compatibility is convenient for new moms to use.3. Closed System Design: The closed system design of these protectors guarantees that chest milk never comes into touch with the pump tubing, preventing pollution and protecting your valuable pump motor from potential damage.4. Premium Material: Breastpump accessory is made of premium liquid silicone for secure and reliable quality. Can be cleaned by boiling water.It is very convenient for new moms to clean and maintain on a daily routine.5. Ideal Gift: This breastpump accessory set comes with a backflow protector and tubing, making it a thoughtful and practical breastfeeding tool that is ideal to give as a gift to a new mom at her baby's weekly party.Specification:Item Type: Breastpump AccessoriesMaterial: Liquid SiliconeApplication: For S1/S2/9 Plus.Package List:2 x Backflow Protectors2 x Silicone TubesNote:Not Original Accessories for S2