Steel step ladder 1.Material:Steel and new plastic material 2.light weight,easy to carry 3.plastic knob Steel step ladder Model No. Extension Size(CM) Folded Size(CM) Packing Qty(PCS)Packingsize(CM)materialThickness (MM) Load(KG)Rungsdistance (CM) Weight (KG)WorkingHeight (CM) Tread Size(CM)YYS220472X50X1236X50X51630X51X1521.01502649413YYS220588X53X1656X54X176630X53X1771.0150264. ...