With the advantages of smooth surface, kinds of size and color (Clear,White,Red,Yellow,Blue,Green,Amber,Ocean Blue,Light Grey, Light purple,etc), high hardness, wearable and stable, widely used as garden, river, aquarium, swimming pool decoration. Environment Friendly: Non poison, Non smell, Non pollution, Non cauterization, safe. ISO9001 Quality Management certified. We are doing a job of changing the waste into valuables, a job of saving energy, a job of protecting our environment and making a colorful world.