ZNB1090 Features: * Extension ladder * 225 lbs duty rating * Large, smoothly operating extruded gravity/spring locks with spring-activated gray super tough nylon flipper * Combination aluminum rail shield bracket and shoe with extruded rubber slip-resistant shoe pad and spur plate * Heavy-duty aluminum extruded pulley with 5/16"" polypropylene rope * Unique extruded aluminum rope clamp ties rope to rung * Polyethylene rung wear sleeves * Non-conductive fiberglass side rails with non-irritating fabric outer mat assures a smooth trouble-free surface even after weathering * 20" Dimensions: * Traction-Tred 1-1/2"" wide deeply serrated aluminum flat D-ring