Strengthen floors in foyers and hallways for heavy foot traffic at your home or business with these MONO SERRA mosaic tiles. A Porcelain Enamel Institute (PEI) rating of 5 ensures these tiles are suitable for heavy pedestrian areas in residential and commercial sites. The frost-resistant tiles also reduce moisture penetration, which can crack tiles in cold locations. With pillowed edges, they have a lower risk of chipping at the corners. The stain-resistant surface affords easy floor care. Add a nice neutral textured base to various spaces with the matte-finish of the grey mosaic tiles. The durability and appearance of the Zen floor and wall tiles make them fitting for indoor and outdoor use. Each box includes five tiles measuring 12 in W x 12 in L, which is enough for a 5 sq. ft. area. They have a limited 30-day warranty.