This is our 1st generation Cat Shelf. If you would like to see the 2nd generation Cat Shelf, which works with our cat mod attachment options, here are some links: 18 version: click here 34 version: click here This solid wood shelf is extremely sturdy and has a beautiful wood grain pattern. Each shelf has its own naturally unique look. We use these shelves as stepping stones for our cats to get to some of our larger pieces and as perches for our cats around the house. We attach two brackets to our 12 Shelves, one to be mounted into a stud and one to be mounted with drywall anchors. When screwed into a stud, these shelves are very strong and have been tested to hold 85 lbs. All our furniture includes screws and drywall anchors. Dimensions: Width: 12 Height (Including brackets): 4 Depth: 9 Pictured are shelves in Espresso and Wood-Burnt finishes.