The original, and after 20 years, still the world's first choice in dusters. Standard Dust-Off Refills fit most other chrome valve systems. Fully Guaranteed to provide years of effective dust and lint removal, the sturdy Dust-Off Chrome Valve is now also available separately. Dust-Off Dusters Products safely and quickly blow away loose dust, dirt and lint from virtually any surface ... computer screens, keyboards, printers, scanners, compact discs, audio equipment, cameras, lenses, enlargers, copiers, fax machines, video equipment, sewing machines, electric razors, microscopes, binoculars...and more! To meet a wide range of usage needs, Dust-Off brand dusters are available in two formulas. Dust-Off Special Application Products have been formulated for use in especially sensitive environments, such as research labs and other areas where flammability is a primary concern. Standard Dust-Off products are slightly flammable, but completely safe for normal use and contain no highly flammable hydrocarbons. Both are 100% safe for the ozone.