Venting Exhaust System Dryer Box; Item Dryer Box; Size 16-3/4 Inch Width x 4-3/8 Inch Depth x 19 Inch Height; Material Thickness 22 Gauge; Material Aluminized Steel; Used On Item Downward Venting Exhaust System and Floor Standing Dryer; Applicable Standard UL (Canada and US); Inside Size 14 Inch Width x 16 Inch Height; Distance from the Nailing Flange to the Rear of Box 3-1/2 Inch