Package Content The full M5 replacement accessories including duckbill valves x2silicone diaphragm x2 24mm DoubleSealed Flange x2 milk collector cup x2 and 8pcs flange inserts15171921cm with 2 pieces per size providing a perfect fit and a comfortable pumping experience Perfectly CompatibilityThe milk collector cup is only compatible with Momcozy M5 wearable breast pump NOT for others and Not original accessories Made by IVARONALConfirm your pump model is M5 before purchase Various Size Option to Fit You We offer 4 different size for your choose15171921mm Size can vary throughout different breastfeeding stages requiring different sizes of flange inserts for your breast pumpCorrect size flange inserts help moms pump more comfortably and efficiently Making Pump Work efficientlyDuckbill valves without gap on valve tips Same suction as orignal pump parts The slit on valve tips stays closed while not pumpingDuckbill valve designed to prevent backflow of breast milk Silicone diaphragm with strong suction power let you get more breast milk when pumping 105Wider Angel doublesealed flange M5 Flange is an upgraded doublesealed flange increase the seal and grab every drop of milk for a better breastpumping experience105 degree wide angle opening more suitable for mothers with large breasts or flatter contour breasts Comfort MaterialEasy Cleaning BPAfree made of foodgrade silicone materialsafesoft and odorlessensuring safety for both you and your baby Washing M5 pump parts after each use with warm soapy water and rinse wellPlease use boiling watersteam with a temperature of 100212for 510mins