This is an original, brand new Bottom Base for Lenovo ThinkPad T480s with a part number of 01YT253.
Lenovo ThinkPad T480s (20L7, 20L8)
Warranty: One (1) Year
How to tips:
1. Please remove all screws that securing the bottom case.
2. Using a thin plastic tool separate the bottom cover from the palmrest assembly. The bottom cover has many hidden latches fastening it to the palmrest. You need to move the plastic tool along the side and unfasten all latches.