Material: 1) The arm is made of high-quality aluminum alloy 2) The fabric is featured with ultraviolet resistant, good warder proof, hard to be distorted. The air permeability of the fabric surface is very good 3)Gear box is made in zinc alloy with painting shell, copper wheel, aluminum alloy wheel bar, high-strength nylon plastic with steel pull hook. 4) The front pipe and the round pipe are made of aluminum, with steel square pipe.Size: 1)3× 1.5M, 3× 2M, 3× 2.5M 2)4× 1.5M, 4× 2M, 4× 2.5M, 4× 3M, 4× 3.5M 3)5× 1.5M, 5× 2M, 5× 2.5M, 5× 3M, 5× 3.5M, 5× 4M 4)6× 1.5M, 6× 2M, 6× 2.5M, 6× 3M, 6× 3.5M, 6× 4M The span is basic on the above size, the length is unlimited just as you like. We can make them according to your specific requirement.