[mae-su]

Hi! I'm working on designing a router-style CNC machine (likely moving gantry) that can ideally cut aluminum. Rigidity is my main concern here, so I'm looking at different options on the X axis framing. The lower profile it is, the better. Yesterday, as I was using my school's laser cutter, I noticed it had some very interesting looking extrusions that made up the gantry. I know that laser cutters aren't subject to the same forces as machines with spindles, but this extrusion feels very rigid compared to others. It's a BossLaser LS-2440, and I've attached a picture of the extrusion below. Does anyone have a hunch on what type of extrusion this may be? Is it custom?

Thanks,
Mae