RoHS compliant DC centrifugal fans.  Sizes from 133mm (5.2") to 400mm (15.7") and voltages from 24V, 36-57V, 48V, and 200-277V.  Airflow from 212 CFM to 1,766 CFM.  High efficiency inlet designs, lubricated maintenance-free ball bearings, vibration-free operation, compact and rugged construction.  IP42 rating w/40,000 hours operation.