TILE & STONE METROPOLITAN Style Number CS30W Construction porcelain Tile Type floor tile Tile Size 6" × 36" Technical Wear Rating Group 3 Break Strength > 330 Water Absorption % < 0.5 DCOF > 0.5 Shade Variation V2 Installation Area Floors, Walls, Exteriors* * Wear rating 3 not suggested for exterior floor applications. A DCOF value of > 0.42 is the new standard for tiles specified for commercial application in standard A137.1-2012, Section 9.6. It replaces the SCOF value of > 0.