Eathtek Replacement 17.3" Laptop Bottom Case Base Cover for LENOVO G780 series, Compatible with part numbers AP0O50002000 31050112 Compatible Model Numbers: LENOVO G780 Compatible Part Number: AP0O50002000 31050112 Replacement and high quality,Replace your faulty, cracked or broken bottom case base cover Each bottom case base cover is tested before shipping All pictures are taken from the real item, please check carefully before bidding.