Rigid Ducts For Nominal Duct Diameter 7 in Inside Diameter 7 in Overall Length 60 in Product Type Rigid Duct Weight 50 lb Material Steel Material Thickness 24 ga Maximum Pressure Rating 3 in wc Maximum Temperature Rating 212 Degrees F Shape Straight End Type Crimped/Plain Standards ASTM A653 and A924 SMACNA Seal Class A Seal Material EPDM Co-Polymer Color Black Maximum Airflow Not Applicable Connection Type Press Fit Minimum Temperature Rating -40 Degrees F Finish Galvanized