Aquarium Skull Cave, Three skulls for fish tank, Halloween Decoration, Aquarium Tested

Dimensions: Small: 4.85” x 3.8” x 5.5” (height) Medium: 5.73" x 4.5" x 6.5" (height) Large: 8" x 6.24" x 9" (height) This skull cave is an excellent addition to any aquarium or as a Halloween or desk decoration. This marble-rock material has been aquarium-tested but we do not guarantee this material to work with all aquariums. If you have concerns about this product, please reach out to us to discuss ways that this item can be made even safer for your aquarium.