I'm not sure how to accurately describe this piece but it is located on the DS below the seat cushions thus below the mechanism on a power bench seat car. It is black and is a curved piece beginning with a 90degree curve along the front edge then tapering back and curving out slightly near the rear of the seat. Maybe an 1-1/2" in overall height. Don't know the proper length because most of mine is missing. This trim piece conceals the mechanism on the seat to provide a smooth clean look when the drivers door is open. Thanks! Steve