Compaq System fan assembly - Includes 92mm x 92mm x 25mm fan (6.0V to 13.0VDC, 54.7CFM) with 3-wire cable, mounting bracket, and finger guard. NMB Model 3610k-04w-b56 - 281811-003. Used in ProLiant 800/ 1200/ 1600/ 2500. Compaq P/N 281844-001