Compatible With the Most PumpThe breastmilk collection cup compatible with most electrical pumps that use the traditional flange and bottle collection method Milk collection cups compatible with spectra s1s29 plussynergy goldMedelaBellababy LansinohNVCIBaby Buddha Zomee Legendairy Milk Phanpy and Freemie enhancing your freedom to choose the best pump for your needs Upgraded doublesealed flange Equipped with 24mm Flange is an upgraded doublesealed flange increase the seal and grab every drop of milk for a better breastpumping experiencekeep your breast pump at the best performance level More Efficiency Antibackflow Our wearable breast pump milk collector set can effectively help you improve efficiency Different from ordinary design our duckbill valves is designed on the sideantioverflow design features on duckbill valve makes milk only goes up clean and pollutionfree Food grade materialMade of soft foodgrade siliconethey are easy to removable and cleanIt is BPAfree and ensures the highest level of safety for your baby Dont have need to sterilize it every time you can just wash it with warm water after use and air dry these parts on a clean and unused towel paper towel or cloth Package Included Each set includes 2Xwearable breast pump milk collection cups 2X24mm flanges 2Xduckbill valves 2XLinker 2xDiagrams2xtubing 2xversatile tubing adapters to connect with a wide array of portable and mobile style bottles and pumps