3M PF319 Black Framed CRT/LCD Desktop Monitor Privacy Filter fits 19" standard displays with a diagonally measured 19 5/8" viewable screen; actual filter dimensions are12 3/8" high x 15 5/16" wide. Screen data is visible only to persons directly in front of the monitor. 3M privacy technology darkens on-screen data when viewed from the side. Keeps your electronic information confidential, making it excellent for use in high traffic areas. Reduces screen glare and reflections. Provides consistently brighter and sharper on-screen images compared to standard blackout privacy filters.