D12x8mm neodymium disc magnets

Neodymium disc magnets are axially magnetized, and the magnetic poles are on two round surface, they are widely used in various fields. The neodymium disc magnets from the picture are measured D 12 x 8 mm, it is made by cutting from neodymium rod that with diameter of 12 mm . There are many other choices  for neodymium disc magnets.