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Your cart is empty. Size:156mmODx80mmIDx20mm-1pcs
Color:Black
1) Outer Diameter is 156mm(6.15"),thickness is 20mm(1/5").
2) it is Ferrite Magnets, The type with strong magnetism in ferrite magnet .
3) it is Grade 12.
4) it is highly stablility udner difficultal environment.
5) notice:It is only for science,craft and production use.
6) 30 days Unconditional refund.
Robert
Reviewed in the United States on June 2, 2023
It's got a lot of power, sticks to steel really well. Keep your fingers out from under it when placing it in place. It's got fairly sharp edges; I would have preferred if they were rounded just a little. I suspect that if you are not careful with it, it would be easy to chip the edges.
S
Reviewed in the United States on March 9, 2023
I purchased this magnet for my physics lab. I didn't look for a powerful magnet like neodymium magnets, so I thought it might work for me. But it is disappointingly weak and can not be used in my lab.
Fabulous Grandma
Reviewed in the United States on October 14, 2023
Very big and strong magnetic field stretches 45 inches
Buy2Much
Reviewed in the United States on April 9, 2023
I gotta tell you, this BY JMY Ferrite Ring Magnet is the top shelf magnet in the magnet world! It's a heavy-duty magnet that's perfect for all sorts of crafts, science projects, and hobbies. I mean, who doesn't love magnets, right?First off, the size of this thing is impressive! With an OD of 6.15 inches and an ID of 3.16 inches, it's definitely not your average magnet. And it's 20mm thick too, which means it's got some serious strength.Speaking of strength, this magnet is a Grade 12, which is about as strong as they come. It'll hold onto just about anything you can throw at it. Plus, it's made of ceramic, so it's super durable and long-lasting. Neodymiun magnets of this size can be extremely dangerous. You can pinch your finger with this when it attracts to a piece of steel but nowhere near the damage people have done with neodymium magnets. Neodymium magnets also shatter and corrode if the nickel plating is scratched. No such problems with this magnet. It'll be kicking around for years, in setting up fun experiments and demonstrations.This is going to be great for science experiments, especially ones involving electricity and magnetism.Overall, I'd say this BY JMY Ferrite Ring Magnet is definitely worth the investment. It's well-made, super strong, and just plain fun to play around with. It's a huge fun size to hold in your hand and show off to others.
Rich
Reviewed in the United States on April 8, 2023
This magnet is very large so I guess thats nice. But it is very weak. On some metal surfaces it cant even hold its own weight. It seems solid but i have a feeling it would break if dropped. I was hoping it would be a lot stronger cause it is so big. I am not sure I can even do basic experiments with it. It is at least safe to play with kids and such.
R. Moheban
Reviewed in the United States on April 4, 2023
Once in the hand this magnet seems very, very substantial! Huge even. Don't underestimate 6+ inches in diameter. It's fun to play with, seeing how it picks up steel and iron.The magnet needs to be close to get an object like a nail to hop and adhere. I have no idea what normal attraction power would be, so I can only assume this magnet is average. Due to its large size, it will grab and hold a lot of screws, nails, or other items.I think it might work to drag it around a grass job site to pick up nails. There are magnet tools designed for that task, but sometimes the wheeled magnetic pick up tools don't work due to bumpy ground or obstructions.This is an impressive magnet just as a curiosity or toy, even if you don't find a practical use for it.
Kristi
Reviewed in the United States on April 4, 2023
For the size of this magnet, it isn't as strong as you would expect it to be. It worked great for my son's school science project, but if you're looking for anything stronger beyond that, you might want to try a different kind of magnet. The size makes it work well for demonstrations in front of a group.
Chi
Reviewed in the United States on April 10, 2023
Physically, this magnet looks like it will pull keys from across the other side of the table. I half expected this magnet to be a challenge for the delivery driver to wrestle off the sides of the van. In use, it's pretty weak, and you need to bring items close to it for them to be magnetically attracted. Not sure if this is representative of ceramic magnets capabilities, but it certainly makes me uncertain if I would get more of them without more research. Plus side, being ceramic it won't rust!
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