The Lenovo 5M11H26266 display cover is a replacement cover component for the display assembly of a compatible ThinkPad laptop. It is listed as the MECH_ASM FRU A COVER,YOGA BK, and its black finish matches the product identification.
Compatibility is listed for ThinkPad L13 Yoga Gen 3, Types 21BB and 21BC, with Type 21BB also specified in the product details. The part is intended for this model family as a display-cover component.
The listing states that the package contains 1 piece.