... to 300x300x11.75mm treatment:galv. or annealed square steel tube / galvanized steel square tube / square hollow steel tubeSection Shape: squarematerial: steeltreatment:galvanized ... ,6.5-13mm120x120mm2.5-3.0mm, 3.25-4.0mm, 4.25-6.0mm, 6.5-15mm130x130mm2.5-2. ... 15mm160x160mm2.5-3.75mm, 4.5-5.0mm, 5.25-9.75mm, 11.5-15mm180x180mm2.5-3.75mm, ... 4.5-5.0mm, 5.25-9.75mm, 11.5-15mm200x200mm3.0-3.25mm, ...