Sipce gel material: made of high quality sipce gel, durable, non-toxic and harmless Re-designed: high degree of simulation, natural effects and reacts, giving you a pleasant visual experience Aquarium decoration: can be used to decorate the aquarium to make the aquarium closer to nature Safety: no effect on fish and fish water, no fading, no need for lighting nor carbon dioxide Easy to clean: easy to clean, this re-airing decoration is the ideal decoration for your aquarium Delivery quantity : four pieces.