Granulated cork - mixed granules (light & dark cork) 100% natural cork granules Designed to replicate the terrain of your pet's natural environment which stimulates digging and burrowing One 4 quart bag provides ideal coverage for 10 gallon enclosures 100% natural and sustainable cork granules replicate the terrain of your pet's natural environment, while helping to stimulate digging and burrowing. The granulated cork bark provides a decorative element while adding terrarium substrate bedding which is a favorite among zoos for reptiles. Granulated cork can be used in gardening, movie and theater sets, and fillers. Each bag is 4 quarts. We would love to hear about unique and innovative uses for this product.