... ,delivery time 7-15 daysgreenhouse panels-polycarbonate green house1. Specifications: 1) Thickness:hollow sheet-4mm, 6mm, 8mm, 10mm, 12mm, ... yellowing caused by the ultraviolet. 4) Light weight: only 1/12 of the weight of glass of the same thickness ... outstanding physical, mechanical, electrical and heat capabilities.3. Applications: 1) Roofing light sheet and sunshade for office building, department ...