D6016-2 Features: -Extension ladder.-250 lb duty rating.-3-1/4" non-conductive fiberglass side rails with non-irritating fabric outer mat assures a smooth trouble-free surface even after weathering.-Direct rung to rail connections with exclusive patented Alflo rung joints.-Non-marring, yellow molded end caps and rail closures.-External guides on top of base section and internal guides on bottom of fly section securely interlock rails.-large, smoothly operating extruded gravity/spring locks with spring activated gray super tough nylon flipper.-Polyethylene rung wear sleeves.-Heavy duty aluminum extruded pulley with 5/16" blue and yellow polypropylene rope. Dimensions: -Traction-Tred 1-1/2" deeply serrated aluminum flat steps.