Made with 3M materials, Privacy Shield® lightweight privacy filters fit standard-format desktop LCD monitors. Micro-louver privacy technology allows only persons directly in front of monitor to view screen image, without blurring or image distortion. When viewed at an angle, the screen image goes dark. Filter can be easily removed for shared viewing, without risk of damage to your desktop monitor. Diagonal Monitor Size: 23"; Fits Device Type: Notebook and LCD Desktop; Frame Type: Frameless; Maximum Antiglare Protection Percent: 95%.