... It can be adjusted freely to a satisfying blocking angle.3) There is manual and electric control.4) Excellent price ... permeability of the fabric surface is very good3) Gear box is made in zinc alloy with painting shell,copper wheel ... of aluminium,with steel square pipe.Size:1)3×1.5M, 3×2M, 3×2.5M2)4×1.5M, 4×2M, ... 5M, 6×2M, 6×2.5M, 6×3M, 6×3.5M, 6×4MPacking:We have several kinds of packaging materials ...