Eathtek Replacement Keyboard for IBM Lenovo Thinkpad T400 T500 R400 R500 W500 W700 series Black US Layout, Compatible with part# 42T3904 42T3937 42T3970 42T4002 42T3273 42T3209 42T3143 Compatible Model Numbers: IBM Lenovo Thinkpad T400 T500 R400 R500 W500 W700 Compatible Part Numbers: 42T3904 42T3937 42T3970 42T4002 42T3273 42T3209 42T3143 Replacement and high quality,Replace your faulty, cracked or broken keyboard Each keyboard is tested before shipping All pictures are taken from the real item, please check carefully before bidding.