... ,ISO 9001,CE and BV 2.Material:Aluminum 3.multi-purpose ladder en131,max load150kg 4.Safe and easy to operate ... 9001,CE and BV certificates2.Aluminum multi-purpose ladder en131(small joint )3.3 step aluminum multi purpose ladder thickness of aluminum 1.2mm ... of aluminum1.2mm A:380mm,B:1010mm,C:1020mm,D:1800mm,E:3730mm professional manufacturer aluminum multi-purpose ladder en131(small joint) ...