I have not had these x-rayed but it seems these ingots are called Lino plus from imperial.
(A link to cast boolit forum on lino plus) http://castboolits.gunloads.com/show...tals-Lino-plus
I have two lots of 11.6 lb boxes. I weighed them 4 times and came up w the same weight each time.
Looking for 43 dollars a box (4 ingots per box) plus 5 shipping.