We obtained these wonderful specimens from an undisclosed government laboratory in Livermore, CA.
It's impossible to say what the lab originally intended for these, but whatever it was, it must have had a pretty good budget because these aren't the typical boards you'll find on eBay or Amazon.
12" by 12" (304.8mm by 304.8mm), double side PCB Board, High Quality Mil-Spec.. Copper cladding on each side; one side is 1 oz/sq. ft. and the other side .5 oz./sq. ft.. E-glass fabric reinforcement material. Board is .005" (0.127mm) thick., MIL-S-13949-GF, H1/HH.
Used for printed circuit boards, Faraday cage shield and RF shielding/insulation. This high quality, thin board is easily cut for smaller projects.
New, unused - excellent condition. Might have some finger prints and/or light scuffs, oxidation; cleans up nicely with a light citric acid & water solution.
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