KWR Shielding BagThe KWR shielding bag is a silver, zip-lock foil used for anti-static protection when storing and transporting sensitive electronic circuits or components. This shielding bag dimensions are 127mm height x 76mm width. The zipper lock closes securely to protect against dust and moisture. This bag works on the faraday shield principle. A faraday shield (also known as faraday cage) creates a protective barrier from electrostatic charges protecting items inside the bag from harmful static charges. Note:Bag carries the identification logo as a reminder that its contents are sensitive to static electricity