PF213C3B. 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. Includes your choice of two easy-to-use attachment methods. Reversible, matte side reduces glare and reflections. Lightweight, thin, frameless design. Protects display from dirt, debris and scratches. Cleans easily with a soft cloth and water. Great for high traffic areas and open office environments. Diagonal Monitor Size: 21.3"; Fits Device Type: LCD; Frame Type: Frameless; Mounting: Attachment Strips; Slide Mounts.