CONTENTS: 2pc 19mm flanges and 2pc duckbill valves compatible with Spectra S1, S2 and 9 Plus breastpump. Made by Momstouch. Not original Spectra accessories. Replace Spectra flanges and Duckbill Valves. Suitable for mother with a nipple diameter 15-17mm. COMPATIBLE AND INTERCHANGEABLE with Spectra pump...