Master Flow rotary turbines are efficient, easy-to-install attic venting options. They allow heat and moisture-laden air to escape, helping extend the life of your roof. Upper and lower steel ball bearings provide years of trouble-free operation.

• Galvanized steel construction
• Externally braced design with integrated base
• Upper and lower steel ball bearings
• Base adjusts from 1/12 through 6/12 pitch
• Rotor size: 18" diameter x 16" height
• 720 CFM air movement
• Throat size: 12"
• MPN GC12E, Master Flow Galvanized Externally-Braced line