STORM ANTHRACITE PORCELAIN PAVING 600 X 900 X 20MM. Storm Anthracite Premium Vitrified Porcelain paving comes in 600x900 size tiles. This is the darkest colour in the king-size range that will make your patio stand out. The colours in the picture show lighter shades due to the weather are only a reference and there may be slight colour variation with tones and patterns. Please Note: The shade of the product could be slightly different compared to the sample as they could differ with batches.