This is an HP power supply for Hewlett-packard (HP) Business Desktop DX7400 Small Form Factor.

GEN, 250W, PFC, dx74xx SFF , PFC Dx7500sff, Lite-On PS-5251-4

HP Part NO: 447402-001.
HP Spare NO: 447585-001

Part Number  447585-001 is used in.
6000PeS/Q8400/160hq/4W/23k ALL
HP Compaq dx7400 Microtower PC
HP Compaq dx7400 Small Form Factor PC
HP Compaq dx7500 Base Model Small Form Factor PC
HP Compaq dx7500 Small Form Factor PC
HP Pro 3000 Microtower PC
HP Pro 3000 Microtower PC BASE (Eureka3)
HP Pro 3000 SFF- SRP CHILE
HP Pro 3000 SFF- SRP LTNA
HP Pro 3000 Small Form Factor PC
HP Pro 3000 Small Form Factor PC, PROMO
HP Pro 3010 SFF E7500 320G 4G 23 PC
HP Pro 3010 Small Form Factor PC
HP dx7400 SFF - PCCS ALL
P3000S/E7500/160hd/2V/27rf ALL

Dimensions:
6.80" x 3.25" x 2.75"

Connectors:
1 x 24 Pin
1 x 4 Pin 12V
1 x Floppy
2 x SATA