Exotic Environments Castle Fortress Cavern Aquarium Ornament is made with durable poly resin material safe for use in all aquariums 6"" by 5"" by 7"", Safe for Freshwater and Marine Aquariums and Terrariums, Hand Painted Detail, Solid one piece construction, Swim thru holes for fish, Product Dimensions: 6"" x 5"" x 7"", SKU: RYLHC825