Duct Hanger For Nominal Duct Diameter 3 in Gas Appliance Category Category I Material Steel Product Type Vent Pipe Hangers Inside Diameter 3 1/2 in Load Capacity Not Applicable Material Thickness 20 ga Compatible with Strapping Size Not Applicable Seal Material Not Applicable Overall Height 1 1/4 in Overall Length 6 in Standards Not Applicable Weight 0.35 lb Overall Width 5 3/4 in For Duct Height Not Applicable For Duct Width Not Applicable Inlet Diameter Not Applicable