High capacity CFM at low amp draw. 5-blade, bullet-nosed impeller & cambered stator vanes provide high pressure with minimum air turbulence. Molded of tough, corrosion-proof ABS plastic with rugged built-in mounting brackets. Molded tabs on all hose flanges provide positive hose connections. Meets or exceeds UL 1128, ABYCH-2, NMMA Certified, USCG 33 CFR Sections 183.410, 183.425 & 183.610 and IMCI Certified in accordance with ISO 9097. Salt spry corrosion-resistant. Humidity exposure-resistant. Vibration & shock-resistant. Low/high temperature performance. Ignition protection. Locked-rotor & blocked-inlet performance. 3 IN-LINE BLOWERS: 3 intake, 3 exhaust with remote mounting bracket. 8L. 4-3/4 mounted height. 170 CFM. 4 IN-LINE BLOWERS: 4 intake, 4 exhaust with remote mounting bracket. 5-3/4L. 4-3/4 mounted height. 240 CFM.