The standard version of the PRO-30 is made from a 50 mm aluminum tube with a thickness of 2 mm, but there is also an option for a 48 mm aluminum tube (3 mm) available at an additional cost. This is the most common system for clubs, stages, theaters, and many other events. The PRO-30 is available in the following configurations: 2-point (Step System), 3-point (Triangle), and 4-point (Square System). The system elements are connected using conical joints. Base plate for FQ30.