• Pack of 10 ferrite magnetic rings with central hole, dimensions: 45 mm outer diameter, 22 mm inner diameter, and 8 mm thickness • Made of grade 8 ferrite, they offer high resistance to demagnetization, corrosion, and oxidation • Each magnet can hold up to 8 pounds on metal surfaces, ideal for industrial and DIY applications • Smooth and anti-rust surface, can be fixed with glue to non-metallic surfaces or attached directly to metallic surfaces • Suitable for scientific projects, tool storage, bag closures, school experiments, and organization at home or in the workshop • Withstand high operating temperatures (up to 200°C), making them suitable for multiple environments • Help save space and keep different work areas organized • Ferrite magnets are fragile; it is recommended to handle them with care to avoid damage • Technical specifications: remanence of 3600-4000 T, coercive force of 1600-4000 KA/m, maximum magnetic energy product of 3-4.2 KJ/m3