19mm 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.

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

Great produce, works wells with my spectra pump!

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!

Exactly what I needed

They work just as well as the regular spectra flanges, the only issue I have with them is milk dripping from the screw on part, it's definitely not a good seal no matter how tight you screw it on

I ordered these after testing what my actual flange sizes were with a measuring kit and inserts. They fit perfectly with my Spectra pump and over doubled my supply since they were finally the right size! If you’re pumping in between nursing or exclusively pumping, having to remove the inserts to wash each time gets burdensome. Buy these and get some sanity back in your day!

They perform well and generally offer suction comparable to the original pump brand parts, often with slightly stronger suction.