The 3M 12.5W Privacy Filter from Lenovo utilize the patented 3M microlouver privacy 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. With identity theft concerns growing and information disclosure laws becoming increasingly more restrictive, the requirement to protect sensitive data is critical. Unique attachment system keeps the security filter in place even when the laptop is closed. - 12.5W privacy filter fits 12.5-inch widescreen laptop computers - Filters are designed for widescreen laptop computers with 16:9 aspect ratio; screens that appear more rectangular than square - Excellent for high traffic areas - Reversible for either glossy or matte screen finish - Reduces glare when used with the matte side facing you - Helps protect your LCD panel from scratches - Easy on easy off attachment system - 3M one year warranty