polycarbonate multiwall sheets: 1.100% Bayer material,UV multi wall 2.ISO9001:2000 standard with 10 yrs warranty,ROHS,SGS Material: From ... Germany Bayer,GE lexanProduction line: 4 line, workshop requirement: ISO9001:2000, 9SQuality:100% virgin bayer material, 50 micron UV layer ... ,10 years warranty,approved by ISO9001: 2000,SGS,RoHS,delivery time 7-15 daysmulti wall ...