Kantek, KTKSVL27W, Widescreen Privacy Filter, 1, Black

Privacy filter helps ensure the privacy of on-screen data on your 27″ wide-screen notebooks and LCD monitors. Microlouver technology creates a narrow viewing angle. Image is only visible to those directly in front of the screen. Side view is black. Privacy filter also reduces glare, increases contrast and protects your delicate LCD surface from damage. Overlay LCD surface with the filter for a built-in look. Aspect ratio is 16:9.
Kantek Widescreen Privacy Filter Black

Helps ensure the privacy of on-screen data with a built-in look
Image is only visible to those directly in front of the screen; side view is black
Use to reduce glare and increase contrast
Also protects your delicate LCD surface from damage