Axial Fan,172Mm X 51Mm, 48Vdc, 4.1A; Supply Voltage Vdc:48V; Fan Frame Type:Rectangular With Rounded Ends; Fan Frame Size:150Mm; External Depth:51Mm; Bearing Type:Ball Bearing; Air Flow - Cfm:555Cfm; Noise Rating:85Dba; Ip Rating:- Rohs Compliant: No |Nmb Technologies R150A3-051-D0790