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. 14mm is commonly used for concreting and as a drainage gravel for plumbers to sparge pipework under buildings. A good size to choose if you can't decide between 10mm and 20mm. It's also an attractive element to use in gardens. Economic order quantities to fill trucks are 3, 5, 7.5, 15, 20 & 32 tonne loads. This product is also available in small 20kg bags as well as 1000kg bulk bags and loose tipped off a truck in bulk.