questions on intercept shields

....i saw these and wondered. do the slab
holder boxes with the windows that show the coin contain the protective chemical inside? or is the chemical only in the
box that holds the windowed slab holders? or both? and how long does the protection last on average? thanks.

"government is not reason, it is not eloquence-it is a force! like fire, it is a dangerous servant and a fearful master; never for a moment should it be left to irresponsible action." George Washington
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Comments
<< <i>Protection is on both. Can't answer the length of protection issue. >>
....thanks!
RMR: 'Wer, wenn ich schriee, hörte mich denn aus der Engel Ordnungen?'
CJ: 'No one!' [Ain't no angels in the coin biz]
Lance.
....thanks all.