Momstouch 21mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Breastpump Replacement to Spectra Pump Parts, Not Original, Replace Spectra Accessories.

Additional Details from the Manufacturer

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• CONTENTS: 2pc 21mm 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 nipl diameter 16-18mm (measured BEFORE pumping).
• COMPATIBLE AND INTERCHANGEABLE with Spectra pump parts. Momstouch pump parts perform the same suction power as OEM parts, Spectra pump parts and accessories.
• DUCKBILL VALVES EASY TO INSTALL AND REMOVE.
• MOMSTOUCH FLANGE can work with Spectra wide-mouth bottle, AVENT bottle and Momstouch widemouth bottle. Available flange sizes:13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm.
• MATERIALS DO NOT CONTAIN ANY BPA. Can be sanitized with water steam, boiling water or microwave-steam bags.