B-Line Eaton series open racks, Aluminum, Silver powder coat, Rack mounted horizontal transition trays for patchcords and jumpers

It's a rack mounted horizontal transition tray that routes patchcords and jumpers across an open frame rack, taking cable off the equipment face and turning it toward the vertical managers or rack sides. It mounts horizontally between rack units rather than on the rack legs, so it's a cable routing accessory, not a rack itself.

Aluminum construction with a silver powder coat finish. That matches the silver powder coat used on Eaton B-Line series open frame racks, so it blends with an existing B-Line aluminum rack line-up rather than standing out like a black or clear-anodized part would.

One part number covers it: SB813TP3SL, in aluminum with a silver powder coat. Order by that model designation, as there is a single configuration rather than a range of widths or finishes.

They do different jobs and most builds use both. A horizontal transition tray like the SB813TP3SL sits in the rack face and carries patchcords sideways off the panels at the same elevation, which is what you want directly above or below a patch panel. Vertical managers handle the bundle running up and down the rack between RU positions. If your problem is cords sagging across equipment faces, the horizontal tray is the fix; if it's bulk cable with nowhere to run top to bottom, you need vertical management.

The tray itself weighs 2 lb. On a data rack populated with panels and switches, several of these add negligible load, which matters if you're calculating total rack weight for a raised floor or a seismic anchoring detail.