AlNiCo 5 Magnet .75 in 19.2mmx1.0 in 25.5mmx1.63in 41.33mm 1022 F cube block precision ground on 1.63in sides.
N to S is between the 11.63in 41.33mm length.
They are relatively strong but could be strengthened with a magnetizer.
Some minor chips on edge and corners...