Mar-resistant, vinyl coated aluminum hoop end caps. Slip-resistant Traction-Tred round rungs. Sections joined by heavy duty extruded fittings and secured by a cam driven tension clamp. Two assembled models. Slip-resistant shoes. Maximum number of sections to be used - 3. Rails: 3-5/16" W. Rungs: 1-1/4" round type. Flange: 1-3/16" W.