No hay artículos en el carro
No hay artículos en el carroB. Arnold
Comentado en los Estados Unidos el 2 de abril de 2024
A magnet for every situation, or at least for every every beaker pretty much. I found the largest one must have the magnet placement incorrect, because it throws itself off to the side every time it starts to spin. The rest of them work well.
Roberto Flores Reyes
Comentado en México el 8 de febrero de 2023
Solo el tamañoAlgunos son pequeños
Joan Hernández
Comentado en México el 8 de septiembre de 2023
Sus diferentes tamaños permiten un mejor uso al hacer procesos de laboratorio
Cutty
Comentado en los Estados Unidos el 20 de abril de 2023
Solid, strong, and very well balanced.
Geovani Rosas
Comentado en México el 29 de noviembre de 2022
Cumplen su función, el precio es algo elevado
Juan isidro juarez avila
Comentado en México el 14 de noviembre de 2022
Llego en muy buenas condiciones
MILFORD
Comentado en los Estados Unidos el 26 de enero de 2022
These are worthy of constant use!
Michael
Comentado en los Estados Unidos el 13 de marzo de 2021
I picked these up recently to put them inside of my airbrush primer and paint bottles. I have a magnetic stirring plate that I placed my bottles on and it stirs my pants and primers while I continue working on another project. These work fantastically inside of the bottles and are perfect for my use. They are easy to clean and do not stain when left in the bottles for a long period of time.If you have a magnetic stirring plate, I highly recommend these little magnetic bars because they match perfectly with all machines universally I believe. They are a great value for their price and work perfectly especially for my uses
scott
Comentado en los Estados Unidos el 12 de marzo de 2021
I use stir bars a lot. I needed some and just happened to come across this kind. Some times you have to use these in really aggressive chemicals. Ptfe is not completely chemically resistant. They do last a long time though. Picture one old kind on the right new on the left. Also in this picture you can see a rough size comparison. Well these new ones are about double the weight of others I have. I would advise caution just dropping these in glass containers I have broke beakers doing that in the past with other ones that weigh less. The magnetism however is also double strength roughly. It is very strong. Picture two you can see the biggest one in use on a hotplate stirrer. It had no problem holding on at the highest rpm the hotplate would go. Some times you need really vigorous agitation. For that these will be great you can see a wild whirl pool as proof. Adding to the positives the price is really reasonable. I do believe this is ptfe. You can usually tell by taking off a small bit and burning it the fluorine smell is un-mistakable. I had a hard time smelling it over other chlorine smells that were lingering in the area. I put it in hot nitric acid to be sure for 30 mins and let it sit for another 12 hours. Its perfectly fine still. The only things I didn't like were that some of the coatings were not uniform. As well as these magnets seemed to always default to the flat side, and they were a tiny bit un balanced, but it was not really a problem. All good for budget stir bar kit though.
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