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Maymom Spectra Flanges Valve Membrane Adapter For Spectra Pumps

5 Stars

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Product Description

Maymom Spectra Flanges Valve Membrane Adapter For ALL Spectra Pumps  
- One-Piece Breastshield (15mm, 17mm, 19 mm, 21 mm, 24 mm, 25mm, 27mm, 30mm or 36mm) internal diameter, the smallest one you can find and specially designed for Sepctra Pumps) , 1 Valve, 1 Membrane & 1 Adapter; Compatible with Spectra pumps S1, S2, M1, Spectra 9 having the back-flow protector.
- Connects to Standard-sized bottle (All Medela, Ameda Bottles, Playtex, Gerber and Dr Brown bottles etc; But NOT wide-mouth bottles like Avent or Wide version of Spectra bottles). Please purchase/Use a Standard-Wide bottle converter for Wide mouth bottles.
- Flanges fit 'narrow' or 'standard' neck bottles (Spectra® uses wide neck).  If you wish to use these flanges with Spectra® bottles please purchase 1 converter per flange
- US FDA registered medical device (No. D192499); Comply with US FDA and EU standards for containers that contact food and class II medical device.
- Retail poly-bag packed; sealed by the manufacturer.
- Made of Bisphenol-A (BPA)/DEHP-free material and all components are steam safe for sterilization.
In the package:
a. One-Piece Breastshield (15mm, 17mm, 19 mm, 21 mm, 24 mm, 27/30/34/36mm internal diameter) x 1
b. Valve x 1
c. Membrane x 1
d. Adapter x 1
Please note that the flanges may not fit the Wide base Spectra bottles. You need the following adaptor if you still want to use the Spectra bottles. See link below:
Alternatively visit our new wide neck flange that can fit directly to spectra bottles and no adaptor required. 
Requested by many Spectra pump users, Maymom develops this special kit just for Spectra users who have small nipple diameters. Spectra does not have this size of flange. It is only available from Maymom.

Please note that for hygiene purpose, no returns will be accepted once item seal is broken. Breastfeeding accessories are personal item.


Note: If you already have the yellow adaptor, or if you are buying multiple flanges, you can opt for the flange without adaptor at a slightly reduced cost. Both are the same except the adaptor included in this listing. See link below:



We also have flange set available,  everything you need for a double pumping including bottles adaptor and backflow protector for your conveniences. See link here.



New! For those with Medela Freestyle, Avent Comfort pump or Ameda purely yours, you can choose the following option to use Maymom smaller breastshield with the pump! 
Brand New Sealed in Package

Breastshields selection guide

How to choose the right size of breastshields for you?

Answer: The inner diameter of the breastshield (B) should be 1-2 mm larger than the diameter of your nipple (N). AFTER a pumping session or 3-5 mm BEFORE a pumping session.  You should be able to see free movement of your nipple during pumping and there should be little or no suction of the areola into the tunnel of the breastshield.

myfit chart


When it comes to pumping comfort, every millimeter counts.  That is why we design a series of breastshields of small increment sizes.  Maymom MyFitTM one-piece breastshields are available in 15 (XXS-), 17 (XXS), 19 (S-), 21 (S), 24 (M), 25 (M+), 26 (L-), 27 (L), 29 (XL-), 30 (XL), 34 (XXL-), and 36mm internal diameters plus 22 mm and 28 mm inserts to fit the majority of breast pumping mothers.

How to measure the diameter your nipple?

Download the nipple caliper file, print it out, cut through the red line, fold along the green dots then you have made yourself a nipple diameter measuring tool!  See below for the finished ruler.

nipple ruler


measure nipple diameter



Disclaimer: Medela, Freestyle, Pump in Style, Lactina, Symphony and Harmony are registered trademarks of Medela Holding AG, Switzerland. Maymom is not affiliated with Medela nor does Medela endorse the product.


Other Details

19mm, 21mm, 24mm

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Product Reviews

Write a review

Showing reviews 1-10 of 11 | Next

  1. Satisfactory 4 Star Review

    Posted by on 5th Apr 2017

    It works but is not as comfortable as Spectra brand and has fewer silicon membranes. However, it has the narrower neck, so this is good. The adapter part is difficult to connect and disconnect, though.

  2. Great conversion flange 4 Star Review

    Posted by on 8th Mar 2017

    Fits my spectra pump well. Been great to able to use the smaller size

  3. Didn't think it could have such an impact 5 Star Review

    Posted by on 23rd Jan 2017

    I realised after 2 months of pumping that i was using the completely wrong size flange. I ordered a new one after using a measuring tool and i can't believe how much time i wasted with the wrong size

    Came with all the attachments i needed plus the ability to still use the flange with other pumps.

    Am so happy with my purchase

  4. perfect for my needs 5 Star Review

    Posted by on 12th Jan 2017

    I purchased these and they are exactly as described. wonderful product

  5. Thank you 5 Star Review

    Posted by on 9th Jan 2017

    Finally I can pump without pain. I can't believe the difference it makes actually having the right size. Thank you so much for making the smaller sizes. They fit right on to my spectra dew pump and bottles and I am so happy with the quality. I only wish I had found these with my first child!!

  6. Just what i needed 5 Star Review

    Posted by on 19th Dec 2016

    I bought the smaller size as the ones that came with my spectra were way too big. I am now pumping a lot more and no more pain.

  7. Great product thankyou smilingbabies 5 Star Review

    Posted by on 1st Nov 2016

    Love these ! I don't fit the standard spectra flanges however these have to come to my rescue. I actually prefer them! They fit all my existing bottles (slim neck) which has saved me lots of money not having to switch over to wide neck.

    Thanks !

  8. Great flanges for pumping 5 Star Review

    Posted by on 26th Oct 2016

    I have an S1 and I love how these come in so many different sizes. They work well and easy to use.

  9. Great product. 5 Star Review

    Posted by on 5th Oct 2016

    Very happy with the quality. Connects perfectly to my Spectra S1. Also very happy with how fast the order was processed.

  10. pump 5 Star Review

    Posted by on 29th Sep 2016

    Fast shipping. Easy assemble. Bought for spectra s1, doesn't fit bottles that came with pump but fits medela and also cheap bottles that had on hand.

Showing reviews 1-10 of 11 | Next

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