Axus contra-rotating circular inline axial flow fan manufactured from pre-galvanized mild steel for sizes 250-1250 diameter. 1400 diameter and above are manufactured from mild steel with hot dip galvanized finish. Fan incorporates inlet and outlet flanges with pre-drilled bolt holes, and an external terminal box to IP55. The motor is totally enclosed and protected to IP55, foot mounted class 'F' insulated and has sealed for life ball bearings. Blades manufactured from injection moulded GRP ot cast aluminium, mounted in a die cast aluminium alloy hub as standard. ~NOTE: Unit diameters 630mm and greater are delivered in two.