Single size blue metal aggregate is available in a range of sizes from dust, 5-7mm, 10mm, 14mm, 20mm, 63mm and in large gabion sizes also. 20mm is commonly used for concreting and as a drainage gravel for plumbers. Ideal for use around agg lines, behind retaining walls. It’s also an attractive element to use in gardens. See more about our blue metal here. Looking for the right pebble for your project? This product also features in our: 20-30mm pebble collection Dark coloured pebble collection Hamptons style collection Note: Pebbles are subject to weather elements, and as such can not be ordered as specific Wet or Dry product. If it has been raining, your product may arrive wet (and appear as per the Wet Look image) and once the pebbles dry out, they may appear as per the Dry Look image. Available in small 20kg bags, 1000kg (1 tonne) craned bulk bags or tipped off a truck.