John Sterling Dual-Trak Adjustable Shelving Standard, 39-inch, Bronze, 0120-39BRZ This wall standard is 39-inches in length This double slot wall standard is designed to accommodate heavy weight loads Designed to be installed to the wall in two ways: Directly into wall studs or hang them from a John Sterling Dual-TrakHang-Trakfor an quicker and easier installation method Features a durable bronze powder coat finish Solid Steel construction provides strength and durability