aluminum ladder 1, durable aluminum material and fine structure 2, non slip standing platform 3,high safety top rail Step laddersSpecification: Model#5300253003530045300553006Sec x Rungs per sec4 x 24 x 34 x 44 x 54 x 6Weight capacity150Kg150Kg150Kg150Kg150KgExtended length249cm362cm472cm575cm688cmStepladder height125cm175cm230cm279cm334cmStorage height72cm101cm128cm150cm177cmLadder ...