Plain Window Reading Rulers

The Plain Window Reading Ruler is a coloured overlay filter and text highlighter about the size of a six-inch ruler. It is discreet and can be kept in a book as a bookmarker for easy storage. Simply read the text through the uncluttered reading window. Features: uncluttered reading window; narrow panel with underlining band; matt finish on one side, gloss on the other; ideal for figures, diagrams and more advanced readers; individually sleeved. Manufactured in environmentally-friendly PET instead of PVC. 10 mixed colours