Privacy Filters Product Description The 3M Laptop/LCD Privacy Filter PF15.4 fits 15.4" (widescreen) laptops. It keeps confidential information private, especially important when working outside the office. The PF15.4 utilizes 3M's microlouvre privacy technology. Only persons directly in front of the laptop can see the data on screen, passersby see only a black screen. It also protects screen from scratches, fingerprints and damage.