... a large factory specialized in the exportation of Chinese aluminum profile, of a wide range of extrusion and fabrication ... profile making is our strength. If you need some aluminum profiles, please feel free to send us the drawings ... will serve you all the time.The detail descriptions of aluminum profile as bellowing:1) Alloy; 6061, 6063, 6060, ... standard GB5237-2008 before the delivery. two-step ladder