Compare 3M (PF400L) for 14-16 in. to 3M Executive (EF200XXLB) for 19-21 in.

Privacy Computer Filter PF400L from 3M keeps your on-screen data private using its patented microlouver technology. The on-screen data is visible only to persons directly in front of the monitor; passersby only see a blank, dark screen. The filter offers privacy without blurring or distorting screen images. It reduces glare and utilizes optimal tint glass for brighter graphics and sharper text. When properly grounded, the filter prevents static and dust build-up and blocks ELF/VLF E-field radiation. The filter is easy to clean with a soft, lint-free cloth and glass cleaner. It is designed for monitors with 13'' to 15'' diagonal size. The monitor shown in the image is sold separately. Less

3M Expressions Computer Filters provide protection and accurate color representation for those with an eye for style. Standard tint glass for enhanced contrast and accurate color representation - excellent for viewing color graphics; Reduced static charge and dust buildup when properly grounded; Designer black satin flat frame matches dark-colored monitors; Significantly reduces screen glare to help prevent eyestrain and headaches related to computer monitor use; Fits both LCD and CRT monitors; Protects fragile LCD monitors from scratches and fingerprints. Less