Polycarbonate Hollow Sheet,They are in high quality,if you are interested in it,please contact me. 1.good light transmission 2 PC Solid sheet,application:1. 1.bus station,parking pot,bower,canopy of corridor2.greenhouse,conservatory,roof of swimming pool3.office building,hotel,stadium,lighting system of public faclity,lighting balcony system4.sound barrier for freeway5.advertising lighting box6. ...