Prodcuct Name:3-wall profile polycarbonate sheet Triple-wall sheet: 1)Tickness:10mm-20mm 2)Max width:2100 and the length is no limited 3)10 colors available(bronze,white,opal ,blue,green,lake-blue,grass-green,etc) 4)we receive various sizes APPLICATIONS 1.Roof lights for application office,building,department stores,hotels,villas,stadiums,schools,amusement centers,hospital ect: 2.Sound absorbtion wall for free ways,high-speed railway and MRT''''