The AG21. 5W9 Anti-Glare Filter for Widescreen Desktop LCD Monitor 21. 5\" from 3M helps to reduce glare and mirror-like reflections. This lightweight, thin, and frameless design filter is easy to apply and reapply numerous times, with no bubbles. It attaches with optically clear adhesive strips. The filter is easy to clean with the included cleaning cloth. It is compatible with most touchscreen displays. Reduces glare and mirror-like reflections Provides a scratch-resistant layer of protection Designed to fit a screen diagonally measuring 21. 5\" and with a 16: 9 ratio Easy to apply, removable and re-attachable. No lamination, no bubbles Lightweight, thin, and frameless design Attaches with optically clear adhesive strips that can easily be applied and reapplied numerous times Easy to clean with the included cleaning cloth Compatible with most touchscreen displays