Miter slot runner material question

Runners for RyobiCraftsman Tabbed Miter Slots mitre slot runners Description The same bars Incra uses in its miter gauges are now available separately for use as miter-slot runners in jig construction zeus the thunderer ii slot The mitre track is mm wide according to my digital calipers But there are two sets of guides for the supplied mitre gauge, which has a T profile This

slot matrix POWERTEC 30 Miter Bar for Table Saw Sled, Miter Slot Runners, Fits 34 x 38 Slot for Crosscut Sled for Table Saw, Taper Jig, Router Table, Band Saw & other