Yz_too&reg;for Thinkpad lenovo T420 T420I T520 T520I W520 7mm to 9.5mm hdd rubber rail or hard drive caddy new for Thinkpad lenovo T420 T420I T520 T520I W520 7mm to 9.5mm hdd rubber rail or hard drive caddy new Will fit 7mm to 9.5mm hard driver (or hard drive caddy) Hard Drive Caddy,Rails,Screws