[Widely Compatible]:The duckbill valves and silicone diaphragms are for Zomee Z1/ Z2 ,NCVI 8782/8780, for BabyBuddha's infamous hands-free breast pump, Motif Twist Breast Pump [Pumping Efficiency the Same as OEM]: The quality and design is the same OEM replacement parts, the duckbill valves without gap on the top and silicone diaphragm are engineered to prevent air leaks and backflow, ensuring a strong, stable suction for more efficient pumping [No Backflow, Non-Leaking]: Silicone diaphragms help keep the suctions strong and tight, avoiding back flow of the milk and speeding up the suction process.Duckbill valves help the flow of the milk. These also help retain a strong suction to make pumping easier, faster, and more comfortable [Gentle&Safe Food-grade Material]: These breast pump replacement accessories are made of transparent food-grade silicone,BPA free, super soft, odorless,The soft-touch material provides comfort for breastfeeding and promotes effective pumping without causing irritation or discomfort [Easy to Clean]: Wash duckbill valves and diaphragm after each use with warm soapy water and rinse well. Please use boiling water/steam, with a temperature of ≤100℃(212℉)for 5-10mins. Color: Transparent Material: Silicone Package Contents: 6pcs * Duckbill Valves 4pcs * Silicone Diaphragm