Parameters :Brand: Springos Color: black Finish: Matte Material: aluminum Installation: non-invasive (glue included) or with 4 screws (included) Dimensions:Side length/depth: 22.5 cm Width: 30.5 cm Height: 4.5 cm Edge thickness: 3 mm Additional information:holes in the bottom the set includes two metal hooks, each 6 cm long, for attaching to the edges can be mounted on glue or screws (included)