The CR Type Counter rotating fans are operational with 12 or 48VDC. Air flows from 0.65 m3/min (22.95CFM) up to 18 m3/min (636CFM). It exists in sizes of 38mm, 40mm, 60mm, 80mm, 120mm square, and 172mm diameter side cut varieties. It offers higher air flow and static pressure than 2 conventional DC axial fans in series.