Rate of Anti-Static effect : 99.9% The unique blend of soft natural hairs and conductive synthetic fibers plus the conductive nature of construction result in effective static dissipation. Dust and lint are whisked away. *Brush length : 8cm [Uses] Hand held anti-static brushes are used for cleaning films, CD, cameras, lenses, glass, plastics, scanners, acrylics, jewelry, key-board, monitors, instruments and technical equipment.