Lixin 4-wall R-structure locking-design system is an saving energy multiwall sheet which developed by Gensin technical team. It provides excellent impact, high light transmission, long-time weathering, light weight and heat insulation properties. The innovative side of the U-lock design making installation easier and faster by using PC/AL profiles. The system eliminates 100% of surface water leaking. It combined with stronger and easier to maintain. Available in 6mm, 8mm and 10mm thickness.