Kensington FS170 Snap2 Privacy Screen for 17-Inch Standard 4:3 Monitors (K55776WW) Fits most 17-inch standard monitors with a 4:3 aspect ratio Narrows the field of vision on the monitor to +/- 30 degrees, helping you keep the information on your screen private Spring-loaded mount secures to the monitor bezzle without hassle or adhesives Textured surface with light tint minimizes glare and improves contrast, as well as reduces harmful blue light by up to 30% Hard-coated surface protects sensitive flat panel screen from smudges and damage