Maymom S001W-F Maymom Pump Parts Work with Spectra S2 Spectra S1, 21mm Flange Valve Tube Bottle Backflow Protector

This product is made by Maymom to fit Spectra's S1/S2 pumps in addition to Spectra 9 and Spectra M pumps. It is known that using the correct size of flange (breastshield) in breastmilk pumping is the most important factor in achieving comfort and efficiency. Every mother was created differently. One or two sizes can't fit all. That is why Maymom develops more than 12 sizes of flanges spanning from 13 mm up to 36 mm to fit the average mothers and those mothers who need special sizes. For pumping comfort, measure your diameter first (do it after a pumping session), and then use the size selector of this listing to choose the size that is 1-2 mm larger than your diameter, which is measured AFTER a pumping session.

• Contents: 2 Flanges (21 mm), 2 Duckbill Valves, 2 Backflow Protectors, 2 Tubes, 2 Bottles
• Compatible with Spectra S2, Spectra S1, Spectra 9 Plus Breastpump
• Made by Maymom, not original Spectra accessories
• Compatible and interchangeable with Spectra pump parts
• Same suction power as OEM parts
• One-piece cap of Maymom bottle includes sealing ring for secure seal
• Designed for travel and storage of formula or breast milk
• Material does not contain any BPA
• Can be cleaned with water steam, boiling water or microwave-steam bags
• Complies with FDA regulations for plastic materials that contact food