The Studica Robotics 144mm Square Beam is 8mm by 8mm. 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. 

The Studica Robotics 192mm Square Beam is 8mm by 8mm. 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. You can easily connect to other channel, extrusions, bushings, bearing, mounting brackets and more so you can quickly assemble and disassemble robots and automated systems. Ideal for rapid prototyping.

The Studica Robotics 240mm Square Beam is 8mm by 8mm. 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. 

The Studica Robotics 288mm Square Beam is 8mm by 8mm.