CMS Magnetics N45 Neodymium Magnet 1-1/2" x 1-1/2" x 1" Block, 1-Count Powerful Grade N45 Neodymium Magnet Has 151 Lbs of Pull Force a Gauss Rating of 13,500 Gauss Superior Quality made under Standard ISO 9001 Quality Control Systems Useful Magnets for Holding, Crafting, Home Improvement, DIY Projects, Kids' Science Education and Projects and Much More Ni+Cu+Ni Triple Layer Coated; The Best Coating Available Magnetized Through the Thickness, the Poles Are on the 1-1/2" x 1-1/2" Surfaces