MILAN MARBLE EFFECT FLOOR AND WALL PORCELAIN STONEWARE TILES IN DARK STRIPE. From an aesthetic point of view, Milan combines the unique nature of the veining with precious patterns and with a palette of colours that are in line with the neutral tones of Twelve50's ranges. The dark pinstripes evoke enigmatic and dreamy moods, together with silky tactile sensations. The industry standard is to include an extra 10% allowance for ‘wastage’.