B-Line Eaton series open racks, Aluminum, #12-24 mounting hardware, Telco gray powder coat, Center mount rack mounted shelf

It is supplied for #12-24 mounting hardware, which is the thread B-Line uses on its open frame rack uprights. If your rack rails are tapped 10-32 or use square-hole cage nuts instead, the #12-24 screws will not thread in and you need hardware matched to your rails.

Center mount means the shelf attaches at the middle of its depth rather than flush at the front rail, so the 11 inch surface is split roughly either side of the rack uprights. That balances the load on a two-post open frame rack and keeps weight over the posts, which is what you want for things like power bricks, media converters or a small switch on an open relay rack.

The finish is Telco gray powder coat, the same standard gray B-Line uses across its open frame rack line, so it reads as a match alongside existing Telco gray uprights and accessories. If your racks are black or a custom color, this one will stand out.

Order model SB5961911ATG. That single part number covers the aluminum, Telco gray, #12-24 center mount shelf, so there is no finish or size option to specify with it.

A center mount shelf like the SB5961911ATG is for two-post open frame racks, where there is no rear rail to carry a shelf and the load has to be balanced over the single set of posts. Its 11 inch depth suits small non-rackmount gear. If you are working in a four-post enclosure and need to set a full-depth server or UPS on it, use a cabinet shelf that lands on both front and rear rails instead.

It is aluminum with a Telco gray powder coat. Aluminum will not rust the way a painted steel shelf does if the coating gets scratched, which is why it holds up in unconditioned closets and MDF rooms. At 2.8 lb it is also light enough to hang one-handed while you start the screws.