The FIS Canned Air Micro Duster is a time saving cleaning tool with a unique variable pressure trigger that lets you control the dusting pressure. Before removing a fiber optic connector for inspection or cleaning, make sure the area around the connector is free from dust. The FIS Micro Duster includes an extension nozzle to provide a powerful blast of air to remove particles from areas that are otherwise inaccessible. The FIS Canned Air Micro Duster contains 100% pure difluoroethane, a colorless, odorless, moisture-free, ozone-safe propellant that can produce pressure in excess of 70 psi.