Fine quality 1.25 inch anti-static brush for film cleaning, camera lens cleaning, the CCD in digital cameras, SLR mirrors, lenses, optics and other sensitive surfaces. Made from a special blend of soft, natural hair and a conductive fiber. To use the dust brush, simply "sweep" the lens or negatives. The brush has a resistivity of 10-1 and will dissipate any static charge and "release" the dust. The StaticWisk brushes can be washed in shampoo and water without affecting their performance. Wash the brushes every six months or as needed.