Maymom Flange w/ Valve, Membrane, and Adapter: Narrow (Standard) Bottle Neck for Spectra Breast Pumps S1, S2, M1, Spectra 9

• One-Piece Breastshield 17mm internal diameter, specially designed for Sepctra Pumps; 1 Valves, 1 Membranes, 1 adapter.
• Compatible with Spectra pumps S1, S2, M1, Spectra 9 having the back-flow protector.
• Connects to Standard-sized bottles Connects to Standard-sized bottles incl all Medela, Ameda Bottles and small version of Spectra, Playtex, Gerber, Dr Brown etc; But NOT wide-mouth bottles like Wide/large version of Spectra. Please purchcase/Use a Standard-Wide bottle converter for Wide mouth bottles.
• US FDA registered medical device (No. D192499); Complies with US FDA and EUstandards for containers that contact food and class II medical device; Test reports are online for your reference;
• Retail poly-bag packed; sealed by the manufacturer.
• Made of Bisphenol-A (BPA)/DEHP-free material and all components are steam safe for sterilization.

Proper flange sizing is the KEY to comfortable and efficient pumping!