This shelf is Black Walnut, and is made to come apart for easy shipping and transport. The construction is all lap joints with no screws or glue, and the pieces lock together without the need for tools. The Shelf mounts to the wall via keyholes routed into the center support which accept standard screw sizes. The overall width is 23" by 10" high, by 5" deep. Each shelf is 14" long, 5" deep, and 3/4" thick. These shelves are made to order so please allow two weeks before shipping. I can make these from other woods so feel free to message me if you want something different, thanks for shopping!