Polypropylene vertical laminar airflow conventional and by-pass fume hood provides quality personnel protection and is suitable for long-lasting, highly corrosive-resistant, metal-free applications. The fume hood is designed for professionals in chemical engineering, electrical engineering, environmental toxic analysis, toxicology, analytical chemistry, and trace metal analysis fields. Each cabinet is inspected and certified to SEFA 1-1992 performance and independently tested to meet the requirements of ASHRAE Standard 110-1995. The hood is manufactured using stress-relieved, fully seam-welded, white 100% polypropylene. The outer cabinet shell, kick plate, and shelves are constructed from ½ inch polypropylene, walls and floors are reinforced maintaining structural integrity. The drawers, drawer guides, sliding window components, handles, hinges and screws are solid polypropylene.