12mm. It is made of MDF lam material. 

-It has four shelves. All edges are rounded and there is no sharp edge.

-Mdf material can be wiped with a damp cloth. It can be washed and ironed easily and repeatedly with the Velcro stitched on it.

-There is a multi-purpose shelf and roof cover in the box. 

- If desired, it can also be mounted on the wall as seen in the photo for security purposes. 

-It is disassembled, installation belongs to the customer.
 Ships with easy installation guide