Yellow highlighter, ink for highlighting text, underlining information, including textbooks, faxes, copies, newspapers and assorted planners, make your text easy to read. Creates thick and thin lines, great for highlights and underlines. Smear-proof, quick-drying ink helps prevent pen ink smudging. Ink has low odor and environmental protection. Service guarantee: if you are not satisfied with our products or have any questions, please feel free to contact us.