Features: 1. Made of high grade material, which is no radiation, non-toxic and also eco-friendly. 2. High brightness, can be used for a long time. 3. Multi functions, suitable for fish tank, garden road, wall, vase, flower pot, swimming pool, bar decorations, etc. 4. Easy and convenient to decorate your fish tank, vase and wherever you could think about. 5. The luminous stones are exposed to the sun and light, which can absorb and store the energy and shine in the dark for a long time. 6. Beautiful colors makes a perfect decoration for your fish tank or other places. Specification: Type: fish tank stones Material: luminous powder + polystyrene resin Size: approx. 2-3cm / 0.8-1.18inch Package Weight: 40g Color: Colorful Applications: suitable for fish tank, garden road, wall, vase, flower pot, swimming pool, bar decorations, etc. Package Include: 20 x fish tank stones 1Made of high grade material, which is no radiation, non-toxic and also eco-friendly 2High brightness, can be used for a long time 3Multi functions, suitable for fish tank, garden road, wall, vase, flower pot, swimming pool, bar decorations, etc 4Easy and convenient to decorate your fish tank, vase and wherever you could think about 5Beautiful colors makes a perfect decoration for your fish tank or other places