actual warhead "physics package" is no more than 102 inches long by 36.52 inches in diameter, with a weight of 6000 pounds. The skin on the 50 in. diameter bomb is described as "fragile," consistent with it being only a lightweight structure housing a smaller diameter weapon. The added length comes primarily from the B-53 parachute system and frangible nose, the excess weight from these and the dummy body.

Although there is only one reported yield for this weapon, the two variants produced -- the "dirty" Y1 and the "clean" Y2 -- suggest that two different yields may exist.