Our 15 x 18 3Mils Reclosable Static Shielding Bags manufactured to provide Faraday Cage protection and visibility for highly sensitive electronic components. These reclosable bags meet the electrical and physical requirements of ANSI/ESD S541, EIA 625 and are ANSI/ESD S20.20 program compliant. Tested per MIL-STD-3010 4046 and ANSI/ESD STM11.11. Static Shielding bags guard against static charges from both inside and outside, with three layers of anti-static protection. Rugged 3 mil zip top bag are 50% transparent for easy product identification. This bag has a buried metal-in construction; a conductive aluminum shield layer is buried between 2 static dissipative polymeric plastic layers. Contains no amines, amides or N-Octanic acid and is polycarbonate safe. A static shielding notice has been stamped in yellow on each bag.