14″ standard internally braced wind turbine attic exhaust vent. Galvanized steel construction – mill finish. Co-polymer bearing system for quiet, long-lasting, and smooth operation – adjusts to 6/12 pitch. Tested to ensure durability and performance in extreme temperatures and high winds. This exhaust vent requires adequate soffit intake vents. Requires 432 sq. in. of NFA (Net Free Area). Includes: Base and riser. Mill finish. Lifetime limited warranty. No. CX14IBGVMIL: Size: 14″, Material: Galvanized Steel, Color: Mill, Type: Internally Braced, Roof Pitch: Up to 6/12, Pkg Qty: 1, Package Type: Box