Neo Disk - D4.75mm x 1.5mm Magnet. Magnetic Product Description: This rare earth disc has a diameter of 4.75mm and a height of 1.5mm. It has a magnetic flux reading of 3364 Gauss and a pull force of .290kg. Its part number is 20080. Uses for our rare earth disc magnets: Metal separation, picking up nails & screws, water conditioning, building generators, magnetic stirrers, metal detectors, tool knife holders, holding, stud finders, magnetic therapy, magic tricks, brochure closures.