Natural Slate Corner Cave Reptile Or Aquatic, fish safe sealant with is uv stable for Axolotl, Catfish, Snakes, Bearded Dragons, Plecos, lizards, Spiders and all other reptiles, All caves and ornaments are handmade so each one will be slightly different, Slate is formed over millions of years and takes on a great dark natural look in any aquarium or Vivarium, Slate is inert so will not affect any water parameters, edges are smoothed off, Free Postage