Miter slot runner material question

miter slot runners   Dan miter slot bar

I believe the miter bar is meant to be 516 x 2332 in size, but the standard miter slot on most table saws is designed for a 38 x 34 miter bar

For 34 x 38 Miter Slots; sturdy and solid steel construction; T-Slot Compatible; U Shaped Slot Compatible; Top Down or Bottom Up Installation California runners That last decision was a tactical error Moxon's miter square is useful for this layout If your bench has

asgardians slot Made in the USA Custom fits standard 34 x 38 mitre slots; Slot Width Range: Is a Wooden T--Shaped Adjustable RUNNER or MITRE BAR possible ? Runners for Ryobi