The volacno is made of safe, nontoxic resin material and the paint is environmentally friendly and harmless to your fish. | One kit includes a Volcano Decoration, 2 Air stone, 2 Valves, 2 Pipes of 1.2 meter, an Air pump and a LED spotlight. | The Size of the valcano: S: 5.3"x3.5"(LxH); M: 6.5"x3.7"(LxH); L: 9.0"x6.8"(LxH). Please check about the size before purchasing. | This volcano aquarium decoration can be set up in both fresh water and salt water. Please soak the volcano in water before putting into fish tank. | This decoration creates a volcano landscape view and the lava explosion look in your fish tank, adds more fun and pleasant in your aquarium.