Square Tube, Standards:ASTM A554,A269,A312,A270,A249, Grades from 201 ,316,304,321,409to 43 Square TubeStainless Steel Square TubeArt Nr.BHT5-25-2525mm25mmT5-30-2030mm20mmT5-30-3030mm30mmT5-40-2040mm20mmT5-40-3040mm30mmT5-40-4040mm40mmT5-60-3060mm30mmT5-60-4060mm40mmT5-60-6060mm60mm Stainless Steel Square Tube