The Ketos Ring is 5″ in diameter and 0.875″ thick, with a 1¼” diameter center hole. The block includes (12) thru-holes at 0.070″ diameter and distances of 0.070, 0.140, 0.210, 0.280, 0.350, 0.420, 0.490, 0.560, 0.630, 0.700, 0.770, and 0.840″ from the OD surface.