Our 30 mm static wisk brushes are 1-1/4″ wide, and feature brush fibers which are composed of a special blend of natural goat hair and soft, natural fibers. Dust is removed by the goat hair bristles, and static is dissipated by the conductive fibers. The conductive fibers are specially woven into a microfiber cloth, which makes the product extremely effective. It will not lose its ability to remove static over time. They were specifically designed to clean photographic images and optical surfaces.