Hoffman WF40LP, Weatherflo¢ Drive Encl W/2 6In Fan, 47.00X24.00X14.00, Type 3RWEATHERFLO¢ Enclosures feature a forced-air ventilation system for cooling drives or other high-heat producing equipment in outdoor applications.Features:16 and 14 gauge galvanized steelLargest two sizes constructed of aluminum