... with 10 yrs warranty,ROHS,SGS polycarbonate sheet as indoor roofing materials Material: From Germany Bayer,GE lexanProduction line: 4 line, workshop ... SGS,RoHS,delivery time 7-15 daysmulti wall polycarbonate sheets,six wall sheet,multiply sheets:Feature:1.Using the latest multi ... break%≥100Sound insulation effectdb20 decibel decrease for 10mm thick sheet polycarbonate sheet as indoor roofing materials