These hyper-tufa tiles are made and then weathered for 2 months. Using our natural resin and glue recipe for moss we attach a living moss carpet with ferns growing through it. The Tiles are strong and thin, and the moss and ferns are well attached. These tiles have been designed for interior and exterior living walls and backdrops for terrariums. They are made to be stuck to the vertical walls with the cement, mortar, or glue of your choice. They can be stuck to brick, or cement walls, or the glass of your terrarium. on the back side, they have indentations to ensure that they stick to the vertical wall. The tiles are sold in packs of 3 tiles. 1 item contains 3 tiles.