Turbine Ventilator, Throat Dia. 8 in, 255 cfm CFM @ 4 MPH Wind, Overall Height – Roof Ventilators 15 in, Overall Width – Roof Ventilators 14 1/4 in, Bracing – Roof Ventilators External, Construction Material Galvanized Steel With Aluminum Bracing, Oiless Bronze Upper Bearing and Lower Thrust Type Ball Bearing, Requires Base for New Installations, Flashing, Includes –
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