3/4 in, Rung/Step Spacing 12 in, Rung Width 13 in, Top Step Height 9 ft, Finish Gray Powder Coated, Rung Shape Round, Includes Rubber Tipped Standoff Legs, ANSI Type Not Rated, Net Weight 40.0 lb Storage Tank Ladder, Ladder Height 9 ft, Overall Width 15 in, Material Steel, Load Capacity 300 lb, Number of Rungs 10, Top to Bottom Rung 9 ft, Rung Dia.