3M Privacy Filter- 3M PF14.1W Widescreen Laptop privacy screen (16:10) for $38.56

3M Privacy Filters for laptops and netbooks are the perfect fit for people who want to keep their private data out of sight. They share the same patented microlouver technology used in 3M Frameless LCD and Framed LCD Filters, blocking the view of curious onlookers without diminishing yours.