Neo Disk - D6mm x 3mm Magnet. Magnetic Product Description: This rare earth disc has a diameter of 6mm and a height of 3mm. It has a magnetic flux reading of 4455 Gauss and a pull force of 800 grams. It is identified by the AMF magnet part number 20071. 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.