... aviation aluminum Secure non-slip rubber 5.2 meters of multi-purpose telescopic ladder Thickness: 1.2mmLoad-bearing : 150KGMaterial: Aluminum alloyStraight ladder ... does not rot, durable .2:All types of ladders are with surface film protective treatment , bright and gloss.3: All products ... high - strength aluminum , wide ,strong, secure . 5.2 meters of multi-purpose telescopic ladder /aluminum ladder