Inc., 40-4084-Lite-Black, 40 Series 40mm x 80mm x 610mm$$Building Supply

40 Series Black Lite Smooth T-Slotted Aluminum Extrusion with Four Open T-Slots Compatible with most 40 Series Fasteners and Accessories Center cavity can be pressurized up to 150 psi Great for work spaces, machine guards, displays, and panel mount racks. Made out of 6063-T6 aluminum with a black anodized finish