Exhausthoods serve a wide variety of industrial processes where toxic contaminants arepresent. Hoods are designed to capture fumes and funnel them into an exhaustsystem where they can be removed from human and environmental contact. Thesetapered rear exhaust fume hoods are fabricated of corrosion resistantpolypropylene which offers excellent resistant to a wide range of chemicals. Hoodsare made to rest on the rear edge of tanks from which harmful fumes mayemanate. When connected to an exhaust blower system, the hoods direct a streamof air across the top of the tank away from the operator. Temperature range: 40°F to 200°F. Dimensions: 12" Length x 42" Wide x 24" High. Outlet: 10". Wall thickness: 1/4". Slot size: 4" Wide x 2" High.