The Studica Robotics L-bracket (2-pack) is made from 3mm thick, 6061-T6 Aluminum, with a length and width of 48mm x 48mm.  The L-bracket is used outside a  U-Channel or Low profile channel.  As with the other Studica Robotics building components, it has the common hole pattern which makes it easy to connect to other structure with very little or no additional machining required.