These 5 Star Office drywipe markers are designed for use on whiteboards in offices, classrooms, or home workspaces. The chisel tip allows for versatile line widths between 2mm and 5mm, accommodating both broad strokes and fine lettering. This pack includes six markers in total, consisting of two black, two blue, one red, and one green marker. The ink formula is xylene and toluene-free for regular use in indoor environments.