The largest tube in the line reinforces the same way: this mill-finished steel core slides inside 2" A120 round tubing — across all six finishes, including the new Chrome — and stiffens the rail where it takes load, from queue railing to guardrail to footrail. It fits .050"-wall tubing, stays hidden inside the rail, and comes in a 12-foot length that matches typical 2" run segments and cuts down as needed. Together with the tubing it reinforces and the matching steel post insert, it completes a heavy-use railing. Load ratings and cut lengths vary by job — call 1.888.285.8605 for a quote.