Billy is a 36" wide lucite single wall shelf featuring metal and knurled support pole hardware. Each shelf unit measures 36"W and 12" deep, with lucite shelves that are 3/4" thick. The shelves are secured to the wall with a bottom lucite support rail attached as one piece. The metal knurled support arms are screwed to the wall for support with four screws shown on the square base plate. The top of the support arm screws to the lucite shelf with a single screw. Minor assembly and wall mounting are required. We suggest a maximum 20 lb weight load. Materials: lucite/acrylic shelf, metal hardware.