Firestop Support Plate, For Nominal Duct Diameter 3 in, Gas Appliance Category Category I, Material Steel, Inside Diameter 3 in, Load Capacity Not Applicable, Material Thickness 26 ga, Compatible with Strapping Size Not Applicable, Seal Material Not Applicable, Overall Height 1 3/8 in, Overall Length 7 1/2 in, Standards UL, Weight 0.57 lb, Overall Width 7 1/2 in, For Duct Height Not Applicable, For Duct Width Not Applicable, Inlet Diameter 3 in, Shape Round, Base Height 1 3/8 in. This item has been restricted from sale in the following state (s): []