The Fellowes Air Duster delivers a powerful burst of air to remove dust, dirt and debris from keyboards, printers and other office equipment, helping to keep your workspace clean and performing at its best. Featuring an optional extension tube for precise cleaning in tight spaces, the 400ml canister is ozone-friendly (HFC free) and ideal for tackling hard-to-reach areas. For optimum performance, the air duster should be used in an upright position only. Please note: do not use near sources of heat.