3M PF21.5W9 privacy filter

With 3M privacy filters, confidential information remains private. Only the person directly in front of the monitor can see the display on the screen. People sitting to the side only see a dark screen. Suitable for widescreen desktop LCD monitors with a 21.5" diagonal and a 16:9 aspect ratio. You can choose from two simple mounting options. It can be flipped around; the matte side reduces glare and reflections. Lightweight, thin, frameless design. Protects the display from dirt, dust, and scratches. Easy to clean with a soft cloth and water. Excellent for high-traffic areas and open office environments.