2020 Series Aluminum Connector Set widely used for building commercial aluminum body structures, 3-d printers, CNC Routers, CNC , Robotics Projects Cast Aluminum Corner Bracket used to attach pieces of 20mm aluminum extrusion at a perspective compatible for many of metric 20 Series Aluminum Extrusion T-Slot Aluminum Extrusion M5x10mm Hardware T-Nuts made of effective carbon metallic Galvanized,surface is plated with nickel for good rust resistance and better functionality excessive hardness and an extended provider life. High Quality Carbon metal Hex Socket Button Head Bolts Screws Nuts Surface chrome finish Anti-corrosion,rustless,non-pollution and high-hardness.used extensively in the home and workplace appliance, communique equipments, ship assembly and other machinery industry colour:Silver Material:Aluminum alloy Package Contents: 10 * nook stand 20 * x 10mm T-nuts 20 * x 10mm screws Only the above package content, other merchandise are usually not included. Note: Light and diverse displays may cause the color of the object in the picture a bit of assorted from the real thing. The measurement allowed error is +/- 1-3cm.