Largest neodymium magnet in the world

This video features my largest neodymium magnet which also happens to be one of the largest in the world. I haven t seen neodymium magnets larger than 6 inches (I ve heard about thin 8 inchers). There is no need for a larger one (just stack more of a smaller size) so they never really bothered to make them or the equipment needed for a larger one. It is also very difficult to magnetize a magnet larger than 68 perfectly. The magnetic field from the magnetizing coil should be in parallel in all off the m