Premium Quality: The extendable telescopic ladder is constructed from aluminium alloy, which is corrosion resistant, rust resistant with long service life. The open height of the folding ladder is 3.8M (12.5ft) Ladder has 13 steps and each rung is designed 39mm extra wide with anti-slip surface. Each step in the extension ladder has a pair of locking mechanisms. These consist of spring-loaded steel pins that automatically lock into place as the ladder is extended. When fully retracted the extension ladder can be easily moved around, or carried. Very easy to store. Interval: ca. 30cm. Max load capacity is 150kg/330lbs (Including the weight of user, tools & materials).