PC Agricultural canopy greenhouse roofing material 1.Started In 2001 2.Factory area:600,000m2 3.Workers: more then 50 PC Agricultural canopy greenhouse roofing material 1. Specifications: 1) Thickness:hollow sheet-4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mmsolid sheet-from 1.4mm-15mm2) regular Width: 1,220mm, 2,100mm 3) Colors: clear, lake blue, green, blue, opal, brown, silvery gray, red(Other ...