Nbparts New Hard Disk Drive Caddy Rubber Rail Screw 9.5mm for Thinkpad T510 T520 T520i W520 Hard Disk Drive Caddy Rubber Rail Screw 9.5mm Thinkpad T510 T520 T520i W520 Item condition: 100% brand new and in good working condition Material : Plastic, Rubber, Metal This kit fit Thinkpad T510 T520 T520i W520 Package Includes: 1 pcs of HDD caddy+ 2 pcs of rubber rails +4 pcs of black screws