Pulling out of a Zinc-Plated Steel Perforated Square Tube with a wide angle macro probe lens - showing texture on metal and some spots of surface rust on the holes

background bar brace channel construction design engineering equipment factory heavy industrial industry manufacture material metal metallic perforated perforated zinc plated steel tubing pipe product production profile reinforce rolled shape shiny square square tubing stack stainless steel stock structure support symmetrical technology texture tubing warehouse zinc plated steel