40mm, 60mm, 70mm Octagonal tube for roller shutters, factory direct prices 40mm, 60mm, 70mm Octagonal tube for roller shutters, factory direct prices40mm has 0.5mm and 0.6mm thickness60mm has 0.6mm, 0.7mm and 0.8mm thickness.70mm has 0.8mm, 1.0mm, 1.1mm and 1.2mm thickness.the length(m) is as customers requirments. Galvanized steel Octagonal tube/axle DPOT40,60,70
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