Motorized Fire/Smoke Damper Round Actual Damper Sz. Dia 15-7/8 In. Material Galvanized Steel Frame 20 ga. Blade 14 ga. Fire Rated 1-1/2 hr. Max Temp 350 Degrees F Max Velocity 3000 fpm Pressure Differential Max 4 in wg Seals Extruded Silicone Rubber Blade Voltage 24 60 Hz 1 Phase Free Area 172.79 sq. in. Nominal Duct Dia 16 In. Depth 15-5/8 In. Mounting Type Vertical/Horizontal