3M Privacy Filter for Widescreen Laptop 17.3 (PF173W9B) by 3M 3M privacy and protection products work simply and beautifully on most of today's Laptop to help protect your screens, and help keep the information displayed on them private. Ingenious microlouvre technology delivers world-class effective privacy. You get crisp image clarity on your Laptop, while visual hackers with side views are kept in the dark. --------------------------------------------- * Find the right privacy filter for your screen. (Step 1) Determine your screen type : Does your device have a raised bezel or a flat front glass screen? : Raised Bezel - screen with a raised frame. : Flat Front Glass - edge-to-edge glass screen without a raised frame. ------------------------------------------------ * Find the right privacy filter for your screen. (Step 2) Measure your screen : For a raised bezel screen, measure the height (h) and width (w) of the screens viewable area within the bezel. : For a flat front glass screen, measure the height (h) and width (w) of the entire glass display. ------------------------------------------------ * Find the right privacy filter for your screen. (Step 3) Find your filter : Use the measurements to select the right sized filter for your device from the products listed below. *** Best fit tip: if you dont see a filter that matches your measurements, select a filter that is smaller (for Frameless) or larger (for Framed), yet closest to your measurements.