Rigid Duct For Nominal Duct Diameter 11 in Inside Diameter 11 in Overall Length 58 3/4 in Product Type Rigid Duct Weight 18.1 lb Material Steel Material Thickness 22 ga Maximum Pressure Rating 42 in wc Maximum Temperature Rating 390 Degrees F Shape Round End Type Quick-Fit Standards Not Applicable Seal Material Co-Polymer Nitrile Silicone Color Silver Maximum Airflow 4 620 cfm Connection Type Clamp Together Series QF Outside Diameter 11 in For Media Type Dust