... years warranty 3.100% virgin makrolon resin Hongyu polycarbonate hollow sheet has good light transmission,high impact resistance,good heat insulation ... ,lake blue,royalblue,green,opal,bronze,red,orange...Data of Triple-wall sheet,Grade A,10 years quality guaranty Thickness(mm)Specification(mm ... and museum lighting system and so on X-Structure Polycarbonate triple-wall sheet,Blue color