Protect your privacy while in the office, at the coffee shop or in any public area with a 3M privacy filter. This filter blacks out your screen to anyone not directly in front of it, giving you the freedom to pay bills or work on classified projects in public areas, without having to worry about anyone watching you. This filter is also reversible, giving you the option to use the matte side for glare protection or the glossy side for increased clarity. Whether you are using it on a desktop monitor or on a laptop screen, make sure to measure your screen diagonally to ensure a secure, proper fit. br br The plastic screen utilizes the patented 3M microlouver technology so only persons directly in front of the display can clearly see the image on screen. Passersby, or those viewing from an angle see only a blank, dark screen. Unique attachment system keeps the security filter in place even when the notebook is closed. PF19.0 fits both notebook computers and LCD desktop monitors with a 19in viewable screen. MPN PF19.0