Dust Collection Duct and Fittings For Nominal Duct Diameter 4 in 6 in 8 in Inlet Diameter 8 in Overall Length 21 in Product Type Double Branch Weight 7.3 lb Material Stainless Steel Maximum Pressure Rating 42 in wc Material Thickness 22 ga Maximum Temperature Rating 1 100 Degrees F Minimum Pressure Rating 2 in wc Shape Double Branch Inside Diameter 8 in Outlet Diameter 4 in Angle 30 Degrees Maximum Airflow Not Applicable Color Silver Connection Type Clamp Together