Corrosion Resistant ASA Synthetic Resin Roof Tile Paper Mill Roof for Pulp Washing Hall Cover Pulp washing halls release warm alkaline vapour all day, and a metal or thin sheet roof above the washers rusts through long before the mill equipment does. Product name HENCING ASA synthetic resin tile Product color Brick Red, Purplish Red, Dark Green,Bule,Grey Length Customized Product thickness 2.5mm/2.8mm/3.0mm Product hight 30mm Pitch distance 160mm Efficiency 960mm Profile