Faraday Cage Kit Medium Box Size EMP ESD Solar Flare Signal Blocking Box Heavy Duty Electro-Shielding Kit - Survivalists Preppers Build your own Medium Faraday Cage, Assembly Instructions Included 5 layer MIL-SPEC material features 2 layers of metal & moisture barrier for ultimate protection &gt;60db EMI attenuation (FULLY SPECCED Premium Material, Product Data Sheet Pictured) Additional proteciton provided by "nesting" electronics in Faraday Defense EMP bags 3pc kit: 2 yards military grade material, 10ft 2" EMI copper joint tape, 30ft 4" EMI copper wrap tape