Our multiwall polycarbonate sheet carries a full 10 year warranty against yellowing and breakage caused by hail. POLYCARBONATE HOLLOW SHEETSpecifications:1) Thickness: 4mm, 6mm, 8mm, 10mm(twin-wall),12mm,14mm,16mm(triple-wall)2) Width: standard width is 2,100mm 3) Length: standard lenght is 5800mm & 11800mm 4) Color: clear, blue, green, opal, brown etcSpecial specification and color can be custom ...