CRT Anti-Radiation / Anti-Glare Filter keeps screen data confidential by making the screen blurry & illegible when viewed from a side angle. When viewed from the front, it is sharp & clear. Filter reduces glare by 99 percent & eliminates 99.9 percent of ELF / VLF E-field radiation. Static electricity is dissipated through a grounding cord to reduce dust buildup & risk of data loss. Filter fits 16" to 17" CRT screens.