Sharpie Marker offers the ultimate fade-resistant marker that withstands the most extreme conditions. They are great for outdoor gear, sports equipment, backpacks and water bottles. Specifically formulated ink provides up to 96 hours in ultraviolet exposure and increased adhesion on most surfaces. The high-porosity nib design delivers more ink, wider lines and higher contrast colors for bolder marks. Ink is formulated with the bold color of dyes and the strength of pigments. Premium permanent marker is ideal for tough conditions across a range of surfaces and offers increased adhesion to plastic surface. The line width is 0.9 from the 1.1mm tip.