This is the perfect guide for those with low vision. Each Magnibar has a yellow tracker line, when it is placed on text, it helps prevent readers from losing their place. Plus, since it is a magnifying bar, text is 1.5x larger, making text much easier to see. This special combo pack includes 3 EZ Magnibars with yellow tracker lines, one 2.50 pocket sized bar, one at 6 long and one at 9 long. Each Magnibar is 1 in. wide with a yellow tracker line that is approximately .25 in. wide. Highlighted line is tall enough to typically hold one line of standard text. Just slide the bar up, down, left or right to continue reading. Made of clear, sturdy lucite.