Product: Maymom Pump Parts Work With Spectra S2 Spectra S1, Incl 21mm Flange Valve Tube Backflow Protector Storage Bag Adapter, Not Original Spectra S2 Accessories Replace Spectra Flange Spectra Duckbill Valve
Brand: Maymom
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 (e.g. 13, 15, 17, 36 mm). For pumping comfort, measure your nipple 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 nipple diameter, which is measured AFTER a pumping session.  There are improvements of Maymom flange over the original spectra design -
 1. In addition to Spectra's duckbills, you can use Maymom duckbills or Maymom valve/membrane system with Maymom flange. 
 2. In addition to fitting Spectra's backflow protector, you can use Maymom long stem, as well as short stem backflow protectors. You can also use Maymom tubing connector (sold separately e.g. ASIN B0033B9CZ2) to connect Maymom flange to many other popular breastpumps on the market.  Content of the kit: 
 Wide Mouth Flange x2 
 Tubing x2 
 Backflow protector x2 
 Duckbill valve x2 
 Breastmilk Storage Bag Adapter x2 
NOTE: BOTTLES and NIPPLES are not included in this listing. 
  About Maymom
 Maymom is specialized in developing breast pump parts that can work with many name brand pumps on the market. The value of Maymom is to care for each mom!  Disclaimer: 
 Maymom is an independent company. Spectra is a trademark of Uzinmedicare, Korea. Maymom is not affiliated with Uzinmedicare.
"Kit Contents: 2 Flanges(21mm), 2 Duckbill Valves, 2 Backflow Protectors, 2 Tubes, 2 Breastmilk Storage Bag Adapters . Work with Spectra S2, Spectra S1, Spectra 9 Plus Breastpump. Nipples and Bottles are NOT enclosed in this kit.
"All pump parts made by Maymom. Not Original Spectra S2 Accessories. Not Original Spectra S1 Accessories. Not Original Spectra Pump Parts.
"Compatible and interchangeable with Spectra pump parts. Replace Spectra Flanges, Spectra Duckbill Valves, Spectra Backflow Protectors, Spectra Tubings. Same suction power as OEM parts. Multiple flange sizes available: 15mm, 17mm, 19mm, 21mm, 24mm, 25mm, 27mm, 28mm, 30mm, 32mm.
"The Breastmilk Storage Bag Adapter is used to skip bottles and pump breastmilk directly into well-known breastmilk storage bags like Lansinoh and Nuk. No need to transfer from bags to bottles. The Adapter also is compatible with Avent wide-mouth flanges. NOTE: Stainless steel spring constitutes part of the storage bag adapter. DO NOT Use MICROWAVE or STEAMER BAG to Sanitize. Boiling Water Safe. Clear BPA Free Material.
"Material DOES NOT contain any BPA. All Parts EXCEPT Storage Bag Adapter can be sanitized with water steam, boiling water or microwave-steam bags. Comply with FDA regulations for plastic materials that contact food.

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