The SMSN0752 SPHERE neodymium magnet is made from high performance N42 NdFeB, with Nickel coating. The dimension of this item is 2″ diameter, with tolerance of ±0.004″. The weight of this super strong neodymium magnet is 1.135 lbs. It can pull up to 103.3 lbs steel. And the surface field is up to 8815 gauss.SMSN0752 Neodymium SPHERE Magnet Safety TipsThe smsn0752 neodymium sphere magnet has a very strong attractive force. Unsafe handling could cause jamming of fingers or skin in between magnets. This may lead to contusions and bruises.You should always wear heavy protective gloves and eye protection when handling the smsn0752 neodymium sphere magnet.Store the smsn0752 neodymium sphere magnet at least one meter away from your body.Separate this item with a piece of cardboard.