The Skylights glass line from Arizona Tile is made from 8-mm, high-quality, heavy-duty, construction-grade glass, which is usually used for commercial windows in high-rise office buildings and hotels. The glass tiles are frost proof and acid resistant. They can be installed in any swimming pool, commercial or residential application, with the exception of those containing stone and metal, which should not be installed in areas fully submerged in water, such as fountains or pools. The 1- x1-inch tiles can be used in floor applications, but the glossy finish will be susceptible to scratching and could also be slippery in wet areas, according to the manufacturer.