Iridescent Pool Glass Tile Aqua Penny Round is face mounted on a 12 inches by 12 inches clear tape sheet for an easy installation. Each individual tile chip is 8mm thick. Iridescent glass tiles reflect the light and create a focal point, providing a great design aesthetic. This mosaic tile is suitable for swimming pool, Jacuzzi, water feature, spa, kitchen backsplash, bathroom, shower walls, and fireplace surrounds. The clear tape is the front of the tile. We recommend peeling off the clear tape after the tile is installed on the surface and the setting material has dried, then follow with grout application. It is common to have the back of the sheet slightly chipped off on some of the edges, however this will not affect the end result since this is the back of the tile and will be hidden on the surface with the thin set material.