DescriptionMade of premium and reliablematerial, sturdy and durable for long time use. Specially designed for holding water plants grass. Perfect for fish tank and aquarium. Simple in structure, very easy to use. The quantity is enough to use, which can meet your different needs.Features-Color:Random Color -Material:Volcanic stone -Size:10.50X8.00X4.50cm/4.13X3.14X1.77in -Made of premium and reliable volcanic stonematerial, not easy to wear or break, easy to place on the fish tank.- Comes with sufficient quantity, which can meet your daily planting needs, change the fish tank's landscape.- Used to fix aquatic plants or grass so that they will not float in the fish tank, easy to use.- It has the function of fixing water plants, and can also be used as a shelter for small fish and shrimps.-It hasa simple design, but very practical in use, giving you a good using experience.