Pure Black Porcelain Tile Matte Finish 24x24 Rectified is a glazed porcelain tile rated for residential and light commercial uses. It is an excellent alternative to white marble tiles since it does not require the maintenance of natural stone such as sealing or polishing. Its finish allows installation on outdoor and indoor as well as wet areas such as shower floor and balcony. Designed with the "practical" in mind, the Pure Gray Tile Matte Finish 24x24 Rectified is presented as a technical color solution to cover façades, public spaces, and interiors full of design. The tiles are rectified - precise machinery cut at the factory plant, allowing the product to be installed with a minimum grout joint, usually 1/16 of an inch. This product is sold by the box.