Durable Powerclean Air Spray Duster Standard 400ml 579619 Air duster for removing dirt from sensitive equipment and hard to reach areas such as keyboard, printers, laptops, etc. Helps improve hygiene in the workplace and reduce sick days. The compressed gas does not leave a residue meaning the air duster can be used without damaging the device that is being cleaned. Each air duster is supplied with an extension tube for those hard to reach areas.