One inch stir bars work well with the micro stir plate but this one can not be used on it at anything other than the slowest speeds.

Much more stable than the short stir bar that came with my stir plate (purchased elsewhere). Spins smoothly with no rattling.

We have a 2 bbl system. I use the 2 inch bar for starters. It works well. We have been a Nano brewery for 4 years.

This stir bar works just like they say it will. I'm very happy

I have an old stir plate, but I could not get this bar to spin. Not sure which is nut functioning, but after reading the other reviews I'm thinking it's the bar.

I suspect the problems I had with this larger bar getting thrown were stir plate issues rather than anything wrong with this perfectly good looking bar. I did end up switching back to a smaller bar in the end though

this stir bar works alright but only at low RPM's every time ive tried to crank up the RPM's on my stir plate it throws the bar.. my advise would be just use the small ones havnt had any problems out of them

If you want big starters, you need a big bar!

This is a great bar for use with larger starters, 2L & up. I purchased a cheaper 2" bar online, but I had issues with it being thrown. This one has worked like a charm.

Good size, quiet, works in 2000ml and 5000ml flask. The most expensive part of my DIY stir plates.

It stirs well on my homemade stir plate. And it's survived several trips into the fermenter.

It worked just fine. Not a "high tech item"

great for when you want to do a starter of your favorite yeast. It works very well.

I use this stir bar with a 5000 ml flask, and it works quite well. It is a little finicky to get going because the positioning on the flask can throw it off, but once I get it set I have no problems and generally don't have to keep an eye on it.I have tried the smaller bars, but when making very large starters they just don't seem to generate enough activity and I can see yeast settling on the outer edges of the flask.

I have had no issues with this in conjuction with my stirplate! Perfect size for a 2000mL flask! Just be careful both when placing it into the flask and when pitching your yeast as so it doesnt go in with the yeast!

It gets thrown if not in the exact perfect spot

Works very well, though sometimes gets thrown if the stir plate is too fast.

After losing my old one, I bought this one and though it does seem to be more sensitive to the speed it works just as well.