Stone Deals Mosaic Mesh for Back Mounted Tile 12" x 12" (Ten Sheets) Material: Fiberglass Mesh which is embedded into a layer of Basecoat which reinforces the product and adds superior strength 12" x 12" (Ten Sheets) Soft Flexible Fiberglass Mosaic mesh, Interior or Exterior use, Easy to use Perfect for larger mosaic projects, Interior or Exterior use, Concrete Reinforcement