Kensington Security Anti-Radiation Filter For 16-18 IN Monitors/High Contrast Reduces 95% of the eye-straining glare from your computer. Drains away 99% of ELF/VLF E-fields and dust-attracting static electricity. Special coatings help improve contrast and enhance images. Prevents on-lookers from viewing confidential data by blurring +-25 degrees from either side. SOLD BY THE EA