Metal sheets with ridges feature a wooden circle embedded within.
A medium-close-up view of metal sheets that run vertically and slightly to the left. Four metal sheets can be seen, the one on the far right is dark gray, and to the right of this one there is a light gray sheet. Next to the light gray one, there is a dark gray sheet and then light gray again. Along the sheets, there are ridges that run vertically, and inserted into one of the ridges running along the dark gray sheet is a circular wooden object. Attached to the very top portion of the sheets, a small amount of metal ridges that run horizontally and vertically can be seen.