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Delivery :provision rectangular tube1. Specification: 16*16-600*600mm2. Thickness: 0.5-40mm3. Standard: Can be required4. All kinds of specification5. Good quality with competitive price6. Packing: Standard export packingThe company can produce various sizes of longitudinally and spirally welded steel pipes according to the following standars such as API ASTM JIS BS DIN and GB etc. rectangular tube, square steel pipe, rectangular steel pipe