18.1" Notebook/LCD PrivacyFilter. Fellowes Laptop/Flat Panel Privacy Filter with black-out technology darkens screen image when viewed from the side to prevent prying eyes from reading your monitor. On-screen data is only visible to the user in front of the monitor. Protects 18.1" laptop or flat panel screen from dust, fingerprints, and scratches. Concerned about privacy, add on shredder: 3245001