3/4" od

This neodymium countersunk magnet is made of super strong N52 NdFeB (NIB) material, coated with Nickel (Ni+Cu+Ni triple layers). The dimension of this Medium neodymium magnet is 3/4″ od x 1/4″ id x 3/4″ thick, magnetized Through Thickness. Its individual pull force is approximately 37.09lbs.