NATURAL ENVIRONMENT: Suitable for home fish tanks and aquariums to create an natural environment within your home fish tank. SIZE: Aquarium decor stone hideaway decor size is approximately 81x79x79mm / 3.19"x3.11"x3.11"(L*W*H). So it can easily be placed in almost any home in a large fish tank. Suitable for small shrimp, or other small fish. ADD BEAUTIFUL SCENERY: Aquarium Decorative Rocks Hide looks like real rocks, making your aquarium look vivid, creating a natural and living environment for the fish, and turning your fish tank into a beautiful landscape. MATERIAL: Aquarium Decoration Stone is made of Ceramic material, which is hard, strong, sturdy and has smooth edges. It will not pose harm to your aquatic animals and will not cause any adverse effect on water quality. Create a natural and living environment for fish. INTERESTING: The Aquarium Decorative Rock Cave allows small fish and shrimp to move back and forth inside. Providing a hiding place for your pets to hide, play, rest and breed helps reduce boredom and aggression.