0.349" id

This neodymium countersunk magnet is made of super strong N42 NdFeB (NIB) material, coated with Plastic. The dimension of this Small neodymium magnet is 1″ od x 0.194″ id x 0.349″ id x 1/4″ thick w/ hole to accept #6 screws, magnetized Through Thickness. Its individual pull force is approximately 9.56lbs.