This High Output Single RAD Fan is part of the HO Aluminum Shrouded Fans Series designed with popular applications in mind. This assembly measures 20 3/4″ wide by 17 5/8″ top to bottom and only 3″ thick overall to offer a precision fit. The raw aluminum shroud gives the user the freedom to polish, anodize, paint, or simply leave it natural to create a truly custom look for an affordable price. The 17″ high output two speed fan is one of the best in our line-up offering 2400 CFM when on high to create the most airflow possible in a compact size.