... toughness by special treatment. 3: Product capability. (1) Extend,fold easily. (2) Few shake. (3) Rungs never be ... must pass professional inspection before leaving factory. (2) Each batch goods, We choose samples to pass ... *16CM Aluminium modeT5-606340HQ1315pcs Thickness of aluminium1.3/1.5mmPriceFOB NINGBO Our products already HOT ... /SGS,CE/EN131)(We also have 3.8m,3.2m,2.9m,2.6m,2.0m and 1.9m*1.9m,etc ...