The 3M PF215W9P Privacy Filter is designed specifically for 21.5-inch portrait monitors with a 16:9 aspect ratio. Made by the trusted brand 3M in the United States, this matte black filter provides privacy and protection for your monitor while maintaining clarity and visibility. With dimensions of 21.8 inches in height and 14.5 inches in width, this desk mount accessory is a practical and functional addition to any workspace.