Genuine HP 500GB 7200RPM SATA Hard Drive 634925-001 Compatible Models: HP Elitebook 2170p, 4430s, 4431s, 4440s, 4441s, 4540s, 4545s, 4730s, 5330m, 6360b, 6465b, 6470b, 6475b, 6560b, 6565b, 6570b, 8470b, 8470p, 8470w, 8560p, 8570p, 8770w, Probook G1 series 350, 400, 430, 440, 450, 630, 631, 645, 640, 650, Zbook 15 serie