... you required 4.Practical&eco-friend Description:Air Duster is a kind of compressed inert gas(R134a ... extended tube to reach untouched places) 1. Air duster aerosol is an inert gas that removes dust, lint ... in just seconds. The moisture-free compressed air duster cleans even the tiniest of crevices, letting you ... Air, Dust-off, Computer cleaner, computer blower, spray duster, blower, keyboard cleaner