MSI Metropolis Gray 12 x 24 MatteA porcelain field tile built for full room installations MSI Metropolis Gray 12 x 24 Matte renders gray tonality across standard format, factory finished for floor rated applications. Integrated underlayment removes the need for separate moisture barrier in most installs; coordinating trims handle perimeter, expansion gap, and material transitions in the same colorway. Quiet underfoot, dimensionally stable across temperature swings, and visually