... 12mm(4/6/8/10/12mm)4) Colors :transparent,blue,green,bronze,opal,red,yellow...etc. Technical ... the fire retardant classification of TONON project sun sheet is B1.4, Impactresistance Its outstanding toughnes offers ... time.6, Sound Insulation The hollow from and polycarbonate resin offer significant advantage to the sound insulation. ... Easy installation can be cold bent. polycarbonate sheet,pc hollow ...