Add the perfect finishing touch to your garden with premium 10-30mm blue slate chips. This decorative surfacing is ideal for your alpines & rock gardens, as well as on borders & beds. This product is also fish friendly making it a great option for aquatic use (wash prior to use). The weight given of 9kg is an approximate weight. Significant variances to weight can occur due to the nature of this product. Products made up of natural materials will vary in size and colour, some significantly.