BCUK Art Reef Rock MediumARR is a product made entirely by hand for this reason no two pieces are the same each box comes supplied with an illustration of what can be built with the contents and some light instructions although you can also use your own imagination to create from the contents. Art Reef Rocks are held together to form your aquascape by pieces of acrylic rod making it ideal for producing some eye catching displays. All material is regularly ICP tested and