Roof ventilator of sculptured tin, base is in twelve individual pieces, formed and soldered together, vent area is also twelve sided with slots 5 3/16" x 1 5/16" cut in center of panels and backed by heavy wire mesh. Panels are joined by tin 1/2 cylinders and soldered. Ventilator top is twelve sided and panels are tapered from 4" to 1/4". Top is formed by three separate pieces soldered together. Top is spire shaped and is topped with 2" circular piece of tin. A twelve sided 1 1/4" thick board has been nailed into base.