12″ and 10 meter Portable ventilator/extractor rapidly remove stale air and ensure a much fresher environement in all manner of different commercial and industrial premises Compact in size, easy to operate, with aluminium 8′ and 5 meter blades.Good for use in manholes, underground tunnels 12″ and 10 meter, shipyards, narrow place, etc. For sufficient air flow and keep air fresh 220 VOLT Made in CHINA