CMS Magnetcs 1.26" Sphere Neodymum Magnet - Super Strong Ball Magnet Toy Numerous Applications: Useful Magnets for Science Experiments, Classroom Magnets, School Projects, Holding, Home Improvement, DIY Projects, Speakers, Arts and Crafts and Much More Best Coating Available: Ni+Cu+Ni Triple Layer Coated. Powerful Magnets: Incredible Holding Power for its Size, Grade N45 - 69 lb Per Magnet Under Ideal Conditions, 13,500 Internal Gauss., Stronger than N42 Rare Earth Magnets CMS Magnetics Super Powerful N52 Neodymium Ring Magnet OD 2 X ID 1 X 1/4" W/ 46 LB Holding Power - Rare Earth Ring Magnet 1 Piece Neodymium Magnet Ring Description. A great deal on great magnets. These neodymium ring magnets are .711 OD x .125 thick, .375 ID (17 mm OD x 3 mm thick, 10 mm ID Shinny and Corrosion Resistance Under ideal conditions, it has a pull force of 50 lbs, and a residual Magnetic Flux Density of 14,400 Gauss or 1., 44 Tesla. CMS Magnetics Disc Neodymium Magnets N45 1-1/2 All Tolerances are +/-0., 002