Sturdy Material: Made of high quality resin, safe and non-toxic material. Suitable for dirty environments and underwater scenes. It is highly resistant to oxidation and will not warp in fresh or salt water. Fits most aquariums: ornament measures approximately 31.5 x 15.5 x 11 .5cm (LxWxH). Can easily fit into any large home aquarium. Design: Realistic design is incorporated - it doesn't just look like a rock, it looks like a rock. The ornaments are beautiful in shape and natural in color, which makes your aquarium more colorful and vibrant. It provides shelter for fish and adds to the joy of living. Great hiding place: The ideal hiding place to help reduce stress levels is a variety of small reptiles and pets. Ideal hiding place for reptiles such as bearded dragons, salamanders, shrimps, turtles, lizards, spiders, loaches, fish, snakes, hamsters, geckos and more