The Garland 1613900 Oven Blower Wheel is a 10-3/4-inch diameter airflow component with a 3-1/8-inch width and 5/8-inch bore. It uses a smooth hub with one set screw and rotates clockwise when viewed from the back of the wheel. Installed within the oven’s blower assembly, the wheel moves air through the cooking chamber as the connected motor rotates it. The concave-back construction corresponds to the specified assembly configuration.