21mm Flange and Duckbill Valve Compatible with Spectra S1 S2 9 Plus Replacment Pump Parts Not Original Spectra Flange Duckbill Valve

These replacement parts for my Spectra S2 were exactly what I needed! The set comes with clear instructions and images, which made swapping everything out super simple, even for someone like me who usually finds pump parts confusing. I especially appreciated the QR codes included; they linked directly to step-by-step instructions and even to individual replacement parts if I ever need to reorder just one piece. The parts themselves feel durable and well-made, and they fit my S2 perfectly without any issues. Everything works smoothly and has held up well after multiple uses and washes. It’s such a relief to have a compatible, high-quality option that makes pumping easier and less stressful. Highly recommend for any Spectra S2 user who wants reliable replacement parts without the guesswork!

Super happy. Fit well. Wash and wear well. Function as they should. No complaints.

As a pumping only mama, and an overproducer, I have absolutely nothing negative to say about these. Compatible with my spectra gold and a great fit! Love that maymom has the in between sizes. Life saver if you do not want to use the silicone flange inserts.

These fit great and worked for my spectra S2!

I bought a full kit before, but it was really hard to fit and not very comfortable, so I decided to try this flange instead. Honestly, the quality is even better than the original one. The edges are smooth, the size fits perfectly, and most importantly, it’s comfortable to use. I don’t feel any pain at all. Plus, it’s HSA eligible, which is a nice bonus. really happy :)

The product was great in that all the parts were compatible with Spectra’s parts and they functioned properly, but the sizing chart in the images was a little hard to figure out and I bought the wrong size. And with pumping, it’s so important to get a good size. I would air on the side of going down rather than up if you’re in between. When I measure, I’m at a 15-16, so I looked at the chart and it said to go to 19mm which was slightly too big and cause led some pain. As far as other details go, the parts are easy to use, easy to clean, and store just like any other parts would. It was a little pricey in my opinion, but it’s still way cheaper than brand name parts. It’s just a shame that you have to kind of guess with sizes and try them all out in whatever range you’re in.

Amazing quality flanges! I originally ordered another flange from a random amazon brand which were terrible and never fully extracted all milk. Once I switched to this brand, I had triple the output in milk.

When I tell you having this extra pair of pump parts in the cycle- your hands will thank you later. The amount of washing and cleaning pump parts have dried out my hands to the point they are cracking from how much washing I’m doing. This way my hands get a break and I’m not scrubbing at 3 am to pump.

Good quality flange, fits spectra perfectly but no valves despite clearly staying flanges + valves. Disappointing as now I'll have to order more.

Was good but not sure how to test different size

Sizing is off if you’re doing a 1-1 comparison with the spectra. Definitely compare with the actual measurements

Funcionan perfecto con el spectra s2!

Good