B-Line Eaton series runway tubular with removable post, 7" height, 119" length, 4" width, Steel, ASTM A513 steel tube, Tubular stringer trough, Flat b

It is steel, specifically ASTM A513 steel tube, finished in flat black powder coat. Flat black is the standard look for cable runway in data centers and telecom rooms because it disappears overhead and hides dust, and the powder coat gives you a painted surface out of the box with no field finishing.

The tubular stringer comes with a removable post, so the vertical support can be taken off the stringer section. That matters on retrofits in a live room: you can set or shift the stringer without pulling the whole assembly apart, and you can drop the post where a floor or rack tie-in lands rather than being locked to a fixed position.

Tubular stringer runway like the SB1809AFB is what you want for open overhead cable support over racks and cabinets, where you are laying in and later adding copper and fiber by hand and need constant access from above. Solid or ventilated channel tray is the choice when cables need physical enclosure or containment, such as exposed building runs. At 4 inches wide, this section is sized for a single cable path, not a wide bundled trunk.

It is a single ordered item, model SB1809AFB, fixed at 7 x 119 x 4 inches in flat black powder coat. There is no size or finish choice to specify. Order by quantity of sections for the length of run you need.

Each section adds 22 lb of dead load on its own before any cable. That is the figure to add into your support spacing and anchor calculation along with the cable fill, since the steel tube stringer spans the full 119 inches between posts.