40 ft.aluminum Extension Ladder with 350 lbs. Load Capacity Type I Duty Rating.This 40 -ft Industrial aluminum extension ladder is ideal for cleaning any gutter, reaching any roof, or washing any high window. This ladder will support all your high-reaching needs, and its rated ANSI Type IA.I also have a 36 ft. Aluminum Extension Ladder for $150, and a 60 ft. Louisville Aluminum Extension Ladder for $750.