Pietra Italia is a rectified through body porcelain that emulates a limestone. It provides a clean natural stone look to any environment. Because this material is a porcelain product minimal maintenance is required. Piece to piece variation in shade or color are inherent in all fired clay products therefore it is recommended to mix tiles from several boxes at a time during installation to achieve the best range of color. When mixing sizes within a series shade texture and calibration differences should be expected. This series is suitable for residential and commercial applications. For proper bonding medium bed mortar should be used when installing tiles with a dimensional length greater than 15" and rectangular shape and plank tile per industry standards. Proper thinset coverage is also necessary and in some cases back buttering of tile may be required. The R11 Anti-Slip Finish is specifically designed for outdoor exposed areas as well as wet applications including shower floors.