Privacy filter is designed to protect your iMac Classic 27" wide-screen LCD and the information on your screen. Patented microlouver technology darkens on-screen data from a side view. Screen data is visible only to persons directly in front of the monitor. They see clearly without blurring or distortion. Filter also protects LCD screens from scratches and damage. Easily attach and remove the privacy filter. Filter is reversible with antiglare surface on one side.