Yz_tooNEW for Thinkpad lenovo T420 T520 W520 T420I 7mm to 9.5mm hdd rubber rail 04W1640 NEW for Thinkpad lenovo T420 T520 W520 7mm to 9.5mm hdd rubber rail 04W1640 Will fit 7mm to 9.5mm hard rubber rails All for Lenovo ThinkPad T420S T400S T520 W520 T430S W530 serise laptop.