This fillable design has 2 layers.  The back is 3mm and the front section is 18mm. 

There is NO acrylic with this design.

All of these mdf sections are cut from high density mdf leaving a clean finish with very little work required on the 18mm due to it's high quality.

The 3mm is laser cut leaving the blackened edges, but the 18mm is mitre cut so it does not have the darkened edge.

Both sections arrive seperate from each other leaving you to easily decorate each section.  You simply need to then glue them together.