3m privacy filters keep confidential information private only persons directly in front of the monitor can see the image on screen others on either side of them see a darkened screen designed to fit widescreen desktop lcd monitors with a diagonally measured 20 viewing screen and a 169 aspect ratio actual filter dimensions are 17 716 wide x 9 1316 high 443 mm x 250 mm includes your choice of two easy to use attachment methods reversible matte side reduces glare and reflections lig