Material: Constructed from durable, lightweight aluminum alloy. Configuration: A versatile, multi-purpose ladder that can be used as a stepladder (A-frame) or extended to a full straight ladder. Dimensions: Total extension length can reach approximately 5.04 meters (around 18feet) Often referred to as a 21ft ladder Load Capacity: Typically designed to support a maximum load of around 150 kg. Safety Features: Includes secure locking hinges, anti-slip rungs, and stabilizing feet for safety during use.