Icon with three filled squares in bar and up-down arrows and 24 pixels (small size). Represents medium level, half value, or third stage. Indicates vertical movement, height adjustment, y-axis operations, plumb positioning, or longitudinal calibration procedures. Used in status, table rows, content creation, editing interfaces, and user interaction systems, where small sized icons are required. Used in status, table rows, content creation, editing interfaces, and user interaction systems, where small sized icons are required.