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3M PF14.1 Notebook Privacy Computer Filter is perfect for laptop computer users on business trips. It allows to work with confidence on airplanes and in busy public venues. PF14.1 fits standard screen notebook computers with a 14.1" diagonally measured viewable screen. Actual filter dimensions are 8.44" high x 11.25" wide. This filter is designed for non-widescreen laptop computers with screens that appear more square than rectangular and have a 4 x 3 aspect ratio. Notebook privacy filters keep confidential and private information private.