The aluminum tube is a circular aluminum profile with an outer diameter of 40 mm, inner diameter of 34 mm, and wall thickness of 3mm. It's designed to be connected and assembled to form stair handrail system with diverse connectors, offering offering high strength and impact resistance. Same as other stairway platfrom profiles, this tube is manufactured from aluminum alloy and finished with sandblasting and anodizing, achieving an oxide film thickness of over 12μm for superior oxidation resistance.