The R1G220-AB35-52 is a 24VDC 11-blade Motorized Impeller/EC Centrifugal Fan with a ball bearing and fiberglass-reinforced plastic PA 6.6 impeller. This R1G220 series impeller comes with reverse polarity and locked-rotor protected motor, black coated rotor and the direction of rotation is clockwise seen on rotor. This backward curved single inlet impeller features S1 mode of operation and variable cable exit.