While we DO supply a silicone heated bed with each order, to reduce unnecessary shipping weight and volume, we have decided not to supply a Build Surface. The additional freight costs to ship a giant 6mm thick sheet of aluminium or Borosilicate glass, far outweigh the cost of the aluminium or glass sheet itself. Suitable rectangular aluminium sheet can be sourced and cut inexpensively in just about every corner of the globe. Google “Aluminium Sheet” to find local suppliers in your area who can cut a sheet to size. For this printer, the sheet size should be 5 or 6mm thick, 890×1120(Max).