General description Ultra Strong Neodymium Disc Magnets are powerful rare earth magnets designed for various applications, including DIY projects and science experiments. Each magnet features a strong adsorption capability, making them ideal for use in refrigerators, shower doors, offices, classrooms, and crafts. Technical specifications Dimensions: 30mm diameter x 3mm thickness Tolerance: ±0.2mm Holding force: at least 8kg Coating: Triple coated for shiny, anti-rust protection Usage These magnets can be used for: Refrigerator magnets Shower door closures Office organization Science experiments Craft projects Classroom demonstrations Other information