Visit our FULL SITE to order Print or eTextbooks The Uni Promark View highlighter has a big window tip that provides a sneak peek of the text you are about to highlight. You will no longer accidentally highlight the beginning of a sentence that isn't highlight-worthy. The window is approximately 7 mm x 7 mm, and the tip draws lines that are 5 mm wide. The cap can be pulled off or comes off even more easily with a slight twist. With a simple and aesthetically-pleasing design, the pen fits into any office or classroom setting.