Use as stack duct line for distribution of supply and return air to branch lines throughout a forced-air system Constructed from 30-gauge galvanized steel for durability and rust resistance 2 "L" sections snap together to form 1 rectangular duct section Use drive and "S" cleats to join 2 sections of rectangular duct together Galvanized steel construction Size: 3.25-in x 10-in x 36-in Type: Stack duct Height (Inches): 36 Length (Inches): 10 Width (Inches): 3.25 Drive Cleats Included: No Gauge: 30.0 Material: Galvanized steel S Cleats Included: No Warranty: 1-year limited CA Residents: Prop 65 Warning(s): No Safety Listing: Not safety listed UNSPSC: 40141900