Material: Anti-corrosion & lightweight 6063 aluminum alloy construction * Expansion Height: 7.2"+7.2";Folding Height: 5.15" * Maximum load for this ladder is 330 lbs;Certificated to European safety standard EN131 * Rung to Rung Height:11.42"" .Fully Extended Length:15.75" * Easy to carry, easy to use, easy to store;Package with user guide and instructions.