UniFlow PVC Acid Digestion fume hoods feature an integral reinforced PVC work surface, dedicated wash down and exhaust system. Digestion hoods come in 48”, 60”, 72” & 96” widths and feature fume chamber and baffles constructed of type 1 PVC. When using hydrofluoric acid, specify polycarbonate sash. It is recommended to thoroughly wash down fume chamber and exhaust system after each use. UniFlow Superstructure exclusive unitized dual wall construction for superior chemical resistance, strength, and durability.