That's a good question. There are a couple different manufacturers of t-slot extrusion. I know that the Alufab stuff is the same spec as 80/20 so they are interchangeable. The video I will be doing for them is going to go in greater detail on it. I personally love the stuff.I have the aluminum t-slot stand that Innovative Marine sells with their tanks. I wonder if they are fabricated by the same company?