The HXTL30II is the same height T-Leg section that comes with a standard front rack. This is offered separately so you can add with different lengths of curved bars to create a side extention or if you want to design a shorter front rack in combination with a shorter curved bars, perfect for designing electronics and percussion racks.
The T-shaped leg for HexRackII is all made from Aluminium and has an integrated clamp at the top of the tube ready to receive an arm or holder.