Type A EN131 (Kingsoft Extra Heavy) aluminum ladder, GS Rheine grade standard production, bearing 175kg, step spacing 300mm, pedal width 80mm, pedal with rough anti-skid strong friction, especially suitable for construction site construction, emergency rescue situation. It is used in oil exploitation, oil refining industry, installation and maintenance of large factory equipment, construction and maintenance of railway Bridges, locomotives and ships, etc. The ladder structure is strong and stable, is really the highest standard of engineering bearing aluminum ladder, high strength, high frequency of use of the first choice.