Compatible Models 6 x Replaceable duckbill valves and 2 x Replaceable silicone membranes for Spectra breast pump Compatible with Spectra S2 Spectra S1 Spectra 9 Plus Spectra Dew 350 Not original Spectra pump parts Same Suction as the Original Our replaceable duckbill valves and silicone membranes are designed to provide the same suction power as the Original Spectra replacement pump parts Easy to Attach and Detach Papablics uniquely designed duckbill valve with an easy grabpull tab that you can detach and replace the duckbill valve easily Easy to Clean Wash the duckbill valves and silicone membranes after each use with warm soapy water and rinse well Dishwasher safe Material Foodgrade Silicone BPADEHP free Comply with EU and US regulations for materials that contact food Please note This is an aftermarket product produced by Papablic Inc Papablic has no affiliation with or endorsement from Spectra