Blade with perfect performance and beautiful shape. The alluminium blade anger can be adjusted steplesly when the impeller is static. Widely used for the ventilation of industrial, mining enterprise, civil building and entertainment. The range is from 12” to 72 ” , Max air volume: 185300 m3/ hour, Total pressure: 1000 Pa Price please call  Phone : +6287780199913  Fax : +621 6245629  Email : airfanteknik@gmail.com