145mm (5.7in) to 347mm (13.7in) lengths.DC Brushless type motor, temperature resistant aluminum alloy, ball or sleeve bearings.Maximum Pressure: 1.5mmAq (0.059inH2O) to 1.9mmAq (0.074inH2O), Maximum Air Flow: 21CFM (0.6m3/min) to 49CFM (1.3m3/min).CE, UL listed.