21mm 2 pc Flanges Compatible with Spectra S2 S1 9 Plus Synergy Gold Breastpump Replacement to Spectra Pump Parts Flange Accessories Wide Mouth Work with Valve Backflow Protector Bottle

Work perfectly for Spectra S1. I always worry about not buying directly from manufacturer but was perfect. Even came with a nipple size check to ensure your buying the right size flange.

These helped me increase my output because I was finally using the correct size flange after ordering! Practically the same as the spectra branded flanges. Comfortable, good quality and works great! The plastic did not become dingy or cloudy with daily washes even after months. Would definitely recommend these.

Has made my pumping sessions so comfortable and works great with the Spectra pump.

I was skeptical about this in the beginning, but this is a great product. I use the Spectra Gold and have purchased both the flanges and the flange and bottle sets. It's a nice and affordable alternative to the bottles and flanges that come with the Spectra pump. I've purchased a few of them so I don't have to constantly wash pump parts multiple times in the day. As long as they keep the quality the same, I definitely recommend.

These work great and fit nearly perfectly. My only complaint is that they don't screw on very tightly to the spectra bottles. So the flanges are a little loose and it makes it risky if you aren't aware of it. The flanges can pop off if you aren't careful.

As others have said it's overall smaller, shorter, less thread but it fits just fine, tight, on my spectra s2 pumping bottles/accessories. I didn't realize (with my first child) different size flanges even existed or the major impact the correct size could have! This time around I finally started looking into different options as I have a lot of trouble with my left breast, I had to pump for the full 30 minutes (pump turns off automatically at 30m) and sometimes longer just to empty. I had bleeding, cracking and pain for months and I just thought that came with the job of nursing and pumping. I blame mommy brain for my ignorance. I bought just one flange to try out, specifically for my left side. I have very large breasts (34 DDD/G) and even the nurses at the hospital said I may need a larger flange, nope, I needed the smallest, 21mm. I tried it out right away (after washing and sanitizing) and it cut my pumping time in half!! I felt like an idiot for not finding this sooner. This will literally save me HOURS a day that was once dedicated to pumping, and with twins and a full time job, I need every second. Mommies these days don't have much free time, and I hated using my free time to pump. I've pumped twice with the 21mm on my left and the standard 24mm (that came with my spectra) on my right. I now feel how comfortable the right size makes pumping, I have no pain or tenderness, with this size, while even after 6 months of pumping my right still feels sore after a session. I'm buying more right away!

I needed to get a smaller size than the ones that came with my Spectra S2 pump so I got these. They screw on just like the original Spectra flanges and fit the bottles the same way. The only comments I have about them is that the flange opening that goes against the breast are smaller in diameter than the Spectra ones. That's really not a problem unless you have a specific pumping bra that might have a bigger opening that basically will have less flange to hold on to. It wasn't a problem for me, but just an observation. Also the material is just a smidge more opaque than the Spectra flanges, so it might be a tad bit harder to see in the flange compared to the Spectra flange. This also was not a problem to me unless I really needed to monitor the flow or I was in very low lighting. Otherwise the material was just as good and as sturdy as the Spectra flanges. They're very easy to clean, and are the same great plastic that liquid beads off of, which really helps drying time. After a couple weeks using them, I wouldn't even know they were not original parts.

Works amazingly with my Spectra S2! My output has definitely increased since I've gotten the correct flange size and it no longer hurts to pump. These look, feel, and operate like they were made by Spectra! Ladies, get yourself these!

Product is not as expected. It was showing 10 days replacement and now when i try to return it is showing not eligible for return. Tell me how to return this product. I am having it for no use

These worked well but I found the backflow protectors fell out a bit more easily than the regular Spectra ones.