B-Line Eaton auxiliary support tube, Steel, Pre-assembled tube, spacer and hardware included, 5" length, Used as an auxiliary support, Yellow zinc, 2"

It ships pre-assembled with the tube, spacer and hardware together, so there is nothing extra to source to make up the support itself. Anything it attaches to (channel, strut, beam clamp or fitting) is a separate item.

The tube is steel with a yellow zinc chromate finish. That is a light corrosion-resistant plating meant for dry indoor use, not a substitute for hot-dip galvanized or stainless in wet, exterior or corrosive environments. For rooftop, wash-down or coastal work, specify a galvanized or stainless support instead.

It is a short spacer-and-tube assembly used as an auxiliary support, standing a supported item off the structure or off a channel by a fixed distance rather than carrying the primary load. Electrical contractors use pieces like this to pick up a secondary point on a raceway, box or equipment run where the main hanger alone does not hold alignment. The B-Line SB200205YZ gives a 5 inch length for that purpose.

No certification applies to this part. It is a plain steel support component, so if your spec or inspector requires a listed or labeled assembly, the listing has to come from the equipment or raceway system it supports, not from the support tube.

The catalogued weight on the SB200205YZ is 6.6 lb, which reflects the packaged quantity rather than a single 5 inch steel tube. Order by the manufacturer part number SB200205YZ so you get the yellow zinc version and not a plain or galvanized equivalent.