... filled in aerosol tinplate can. When spraying, strong air blows away dust (also with extended tube to reach untouched places ... Extension tube for hard-to-reach places 3. Applicable to cleaning dust on computers, electronics, electrical, data processing appliances, office ... freezing effect of the inert gas. Canned Air, Dust-off, Computer cleaner, computer blower, spray duster, blower, keyboard cleaner