7pcs/Pack Mixed Size PTFE Magnetic Stirrer Mixer Stir Bars Type-B Set

The 35mm, the two 30mm, and the 15mm worked great! The 25mm, the 20mm, and the 10mm didn't work well, as they seemed unbalanced, so they were noisy and it was very hard to get them to work. I am using these with the INTLLAB Magnetic Stirrer.

I bought these to replace my LOST set... And the LOST ones turned up right AFTER two uses of the new ones. These work very well for me and have a nice little case. SO... I hope not to lose any of these.

good

These are PTFE coated magnetic stir bars. They do the job quite well. I'd highly recommend them if you're doing anything where you need these. Decent price, and definitely good quality. Mine had a NICE thick coating, such that one of them fell in the garbage disposal, and made a terrible noise when I turned the thing on. After extraction, I saw a pretty heavy cut in the coating, but it wasn't cut all the way through. I use mine for food, so that one's in the trash (better safe than sorry) but if you're doing something else, this would probably have still worked fine after being in the garbage disposal (that noisy thing in your sink that beats up food and allows it to go down the drain, if you're reading this from some location where you don't use that same term.). Would buy again.

Concuerda con la descripción.

Got the set of stir bars to replace one that i lost that came with my stir plate. The stir bars seem to work fine testing them with a 2L Erlenmeyer flask. No issues, would recommend to others looking for cheap, functional stir bar set. Using them for yeast starters, so nothing complicated. Good deal!

Great

Exactly as described, good quality. No raised center rotation band, as some stirrers have, however this was not a problem for me and the product info does not state this band is present - just an FYI if this is important to you.

Incroyable! Leur taille est parfaitement cylindriques, leur couleurs éclatantes et que dire de leurs équilibres parfait pour crée un mélange tout aussi parfait!

No complaints after having these sit in liquid culture for 2 weeks, no signs of rusting. Nice to get different sizes but the little one is REALLY little so make sure you don't lose it.

These magnets are smooth compared to the one that came with my machine which has a ridge. I see the median ridge makes a difference when it comes to getting things ti start stirring. These would be improved with ridge around their equator.

Works well. Need a stir plate to use. No complaints. Did what it was supposed to. Would buy again.

You get what you pay for. The PTFE coating is fine, not too thin or anything but the magnets are clearly not the best. I think probably just cobalt magnets when lab grade ones are neodymium/rare earth magnets. I used the large one in an oil bath at 150⁰C and well it isn't very magnetic anymore. The smaller ones couple much stronger to each of my three hot plates (Corning, VWR, Scilogex). If you want to stir room temperature sure but l wouldn't be too aggressive heating these.