B-Line SB596V19156ATG Eaton series open frame racks, Aluminum, Telco gray powder coat, Four mounting spaces required, Double sided rack mounted shelf. Heavy duty, solid shelf

The SB596V19156ATG rack shelf occupies four mounting spaces, which is 4U of vertical rail space. Its stated height is 6 inches. Plan the rack elevation accordingly, since anything mounted directly above or below has to clear that 4U block.

Double sided means the shelf mounts to both the front and rear mounting rails of an open frame rack rather than cantilevering off the front rails only. That is why it needs the full 20 inch depth, and it is the reason the shelf carries load without sagging at the back edge. On a two post open frame rack with front-only rails, a front-mount cantilever shelf is the right choice instead.

It is a solid shelf, not vented. Solid decking is what you want for equipment with side or rear intakes, media converters, small UPS units, or anything that would fall through a vented pan. If you are stacking gear that pulls air straight up through the bottom of the chassis, a vented shelf is the better pick.

Construction is aluminum with a telco gray powder coat, the standard finish on Eaton B-Line open frame telecom racks, so it matches gray relay racks and ladder rack accessories in the same family. Aluminum also keeps the shelf light at 5.4 pounds, which matters when one tech is holding it up against the rails while starting screws.

Roughly 19.31 inches across by 20 inches deep, with 6 inches of vertical height consumed in the rack. That footprint takes most half-width network appliances side by side, or one full-depth device. Measure your equipment's depth against the 20 inches before you commit, since a deeper chassis will overhang the rear edge.

Order by manufacturer part number SB596V19156ATG, Eaton B-Line series. That is the aluminum, telco gray, four mounting space, double sided solid heavy duty shelf. Mounting screws and cage nuts for your specific rack rail type are separate items.