Faux Rock Large Round - Multiple Color OptionsVivarium Works rocks are molded from a high quality flexible resin to capture the durability and texture of real rock all while keeping weight minimal. This versatile material features a solid flexible foam core coated with a detailed, flexible resin layer, providing high detail and high durability. It's suitable for various reptile and amphibian enclosures. Ideal applications include dart frog vivariums, snake exhibits, and other small to medium