Part of the roof-gutter possibly belonging to one of the long sides of the Hekatompedon's roof. Its right side has anathyrosis while the left one is broken off. A large portion from the slab’s rear part, as well as the upper left corner where a metal dowel probably indicates an ancient repair, are missing. On the slab’s front side a cylindrical spout is preserved.

The roof-gutter is decorated with alternating, engraved palmettes and lotus flowers blooming out of motifs in the shape of the figure eight. Traces of red paint are seen on the palmettes’s outline and the middle of the lotuses. The same colour is used for the eight shaped motifs either on their contour or on their inside. Some of the decorative elements were, however, originally highlighted with dark blue colour.