Neodymium Rare Earth Disk Magnet, Grade N35, Size: 0.5 x 0.125 inch.
Super strong (N35)disk magnet with outer diameter of 0.5 inch and thickness of 0.125 inch.
N35=35 MGOe (Mega Gauss Oersted)= 3500 Tesla
North pole may be marked with a red line. You may also identify the poles using a magnetic compass.