Colorbond is a BlueScope Steel product: pre-painted Zincalume sheet in a fixed range of architectural colours. Colorbond fence panels slide into channelled steel posts, with rails running top, middle, and bottom. The system is the dominant residential boundary fence in Australia, mostly because it's cheap, looks clean, and lasts 25 years before fade is noticeable.
Standard panel heights are 1500, 1800, and 2100 mm. The colour palette includes Monument, Surfmist, Basalt, Woodland Grey, and a dozen others. Posts and rails are usually painted to match the sheet.
Not a security fence (the sheet is 0.35 mm steel and dents under any kick) and not pool-compliant on its own (the smooth face actually helps a climber). For a privacy fence on a boundary line, it's hard to beat on cost-per-metre.