Super Slate Black is a 12" x 24" porcelain tile with rectified edges, which allows a tighter grout joint. The face carries the movement of quarried stone. A matte surface holds light rather than reflecting it. It carries an R10 slip rating, which is the usual choice for a kitchen or bathroom floor. It is frost resistant, so it can run from an interior floor onto a covered porch or patio. A box holds 8 pieces and covers 15.5 square feet. Made in China.