40 Series 8020 Modular Extrusion with two open t-slots to accommodate 40mm x 40mm based joining plates, brackets, and t slot accessories. High strength 6063-T6 aluminum with an anodized finish offers great flexibility and strength for your linear rail, t slot rail, linear motion guide, extrusion rail, cnc guide rails, and many other applications. With superior quality control, you know you are getting the best t slot aluminum extrusions when you order 8020 aluminum extrusion. Deburred ends, clean cuts, and tight cut tolerances are guaranteed. 80/20 aluminum extrusion profile is a good linear motion material and allows adjustable placement of all components. Applications include automation equipment, professional 3D printer, workbenches, lasers, stands, furniture, machinery, fitness equipment, precision printers, guarding, woodworking and t tracks. 40-4045-LIte is a 40mm x 40mm metric 40 series 45 degree closed back T-slot profile with two open T-slots, one on each of the 40mm profile faces. The profile is smooth, which makes it resistant to dirt and debris buildup while also being easy to clean. The 40-4045-Lite profile is compatible with 40 series fasteners. This profile lends itself to large workstations and displays because panels or other support structures can be easily placed in the T-slots allowing a continuous surface and aesthetic appearance.