Axial fan on ball bearing in aluminum housing. Productivity 500 m3 / h. Power 41 watts., 4000 rpm. Size 172 * 172 * 50 mm The number of revolutions (productivity) is regulated by a power supply unit from 12 to 24V. Due to their power, these fans have a wide range of applications: room ventilation, various hoods, cooling mining farms, radiators, welding, etc. The power supply is NEW! -regulated output voltage in: 12V, 15V, 16V, 18V, 19V, 20V, 24V; -universal input voltage: 110-240 VAC; -stabilized output; Built-in overload protection DC regulator; -led indicator; -power 120 W. Options: universal power supply for a laptop: 1 pc.; eight removable connectors: 1 pc.; power cord: 1 pc Also available separately!