3M™ Privacy Filters help protect your confidential information from prying eyes which make them ideal for high traffic areas. - PF12.1W fits widescreen notebook computers with a diagonally measured 12.15" viewable screen. - Actual filter dimensions are 6 7/16" high x 10 5/16" wide. - This filter is designed for widescreen notebook computers with screens that appear more rectangular than square and have a 16:10 aspect ratio. - Utilizes 3M's microlouver privacy technology so only persons directly in front of the monitor can see the image on screen. - Reversible for either glossy or matte screen finish. - Protects fragile LCD screens from scratches and abrasions.