This 12" 25 ft. hose is deal for air cooling all Sun System hoods. Also can be used in various heating, ventilation or exhausting applications. These Class 1 aluminum flexible air duct connectors are made from tough, puncture resistant 3 ply aluminum foil laminate & contain a high density corrosion resistant wire helix in the duct wall for support. UL Listed. These stainless hose clamps are perfect for attaching duct to Sun System reflectors. They are simple to use and make for a clean & attractive duct connection.