HP 517721-B21, PCI, 36.5 mm, 222.2 mm, 287 mm, 680 g, 36.5 x 222.2 x 287 mm HP 517721-B21. Host interface: PCI. Width: 36.5 mm, Depth: 222.2 mm, Height: 287 mm. Dimensions (WxDxH): 36.5 x 222.2 x 287 mm, Size (imperial): 3.66 cm (1.44")