Durable Powerclean Standard 400 Compressed Air Duster removes dirt from sensitive equipment and hard to reach areas such as keyboard, printers, laptops, etc. The air duster helps to 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.