1 Piece4" x 4" x 1"Neodymium MagnetsBlockGrade N40
These are the latest material innovation products and 8 times stronger than ceramic magnets. It's so powerful that a single piece of the magnets has the lifting power of 319 lbs.
* Call (***) 227-2344 for details
* It's a must have for kids' science projects
* Nice and clean for fridge magnets
2. If you have never played this kind of magnets, please don't purchase this sets. Unexperienced person may hurt himself or break the magnets.