B-Line Eaton series open racks, Steel, Yellow zinc, 12-24 panel mounting holes, 43 mounting spaces, Throat style, Open duct unequal flange rack, 11 g

43 mounting spaces means 43 rack units (43U) of usable panel height on the SB5761138YZ. That is room for roughly 21 two-rack-unit switches, or a mix of patch panels, cable management and UPS gear, with each space taking a 1-3/4 inch tall panel.

Yes, the SB5761138YZ carries a UL Listing, which is typically what a facility spec or inspector wants to see on rack and frame hardware in a commercial telecom or electrical room.

An open duct unequal flange rack like the SB5761138YZ leaves gear exposed on all sides, so air moves freely and you can reach cabling from either side without opening doors. Pick it for a secured, dedicated telecom or electrical room. If the equipment sits in a shared space where you need locked doors, dust control or side panels, use an enclosed cabinet instead.

The unequal flange, throat style channel on the SB5761138YZ gives you an open duct down the upright, so patch cords and power leads can drop inside the rack profile rather than being strapped to the outside face. That keeps the front of the panels clear and is why this style gets specified in high density patching rooms.

The rack weighs 130 lb on its own, in 11 gauge steel, and stands 138 inches tall. That combination of height and mass means it is a two-person set and must be floor anchored (and normally top braced or ladder-rack tied) before you load equipment into it.

The frame is steel with a yellow zinc finish, a plated corrosion coating suited to dry indoor equipment rooms, basements and utility spaces. It is not a coating intended for outdoor or wash-down exposure.

Yellow zinc is a conductive plated finish rather than paint, so the rack uprights are not electrically isolated the way a powder coated frame is. Even so, bond the rack to the telecom ground bar with a dedicated grounding conductor and lug; do not rely on the plating alone.