Type:Float rock Material: Float Rock Size:S 4~5cm/M 6~7cm Shape:Irregular Quantity:3pcs/bag Weight:App 187g Package: 3pcs Float Rock/Bag Feature: The floating rock is real rock,can not make sure exactly the same style and shape,only charge by different size, style and shape by chance. The floating rock is a porous lightweight glassy acidic volcanic eruption rock. Can make aquatic landscape water plant tank like Avatar. The weight of the pumice are light, it will float on water. Can absorb the water harmful bacteria and heavy metals,conducive to plants climbing and take root, plants itself can dissolve mineral not only conductive to the fish grow, can also provide fertilizer for the plants. Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors.such as brightness of your monitor and light brightness. Please allow 0.5-1cm error for the measurement data. If you have any questions,please feel free to contact us. Thanks!!!