Metal 4 Tier Ladder Shelf has 4 tiers for you to place stuff, it is not  only for the bookcase but also can be used as a bath towel shelf, or a  plant flower stand, which can be made your home tidier.  

  
4 tiers for you to store stuff.
  
Can be used as a plant flower stand and towel shelf.
  
Lightweight for movement and assembly.
  
Easy to understand the instruction for assembling.
  
High-quality material.
  
non-collapsible. 
  
Color: Green.
  
Overall Size: 15.7" x 2.9" x 46.5".
  
Material: Stainless Steel.