Vivi Audio&reg; 4X Hard Drive Mounting Screws for HP 6000 6005 Pro, 8000 8100 8200 Elite DC7800 7900 To fit:HP 6000 6005 Pro 8000 8100 8200 Elite DC7800 7900 hard driver screw cap 0.6 cm thick,screw foot 0.5 cm, a total length of about 1.1 cm hexagonalscrew for HP 3.5 inch hard drive,HP Main box screw Attntion:A set of 4 pcs Screw with the hard drive isolation grommets