Its listed as 20" Super Mini. On sale thru today for $165.00 plus shipping.
Here are the details on it.
148 CFM Shaded Pole Exhaust Fan
115 volt - 1.37 amp - 3,160 RPM
26 Gage Galvanized Sheet Metal Construction
4" Collar to Exhaust to Outside, up to 15 feet
Heavy Duty Power Switch
20" X 12" X 1" High Capacity Pleated Air Filter
One Year Warranty
Made in the U.S.A. by Pace Enterprises
http://www.pacepaintbooths.com/pace/