Tree bark Cave Aquarium Ornament Decor Drift Wood Trunk Ornament is made from non-toxic poly resin material and makes an exciting ornament in any aquarium. - Offers the natural environment feeling. Change your aquarium into a beautiful scenery - It is vividly and color detailed to add lively and natural life to your tank. It is great to decorate your aquarium all the time with minimum responsibility and maintenance. It is suitable for salt and fresh water Measures approximately: 7.4" X 3.3" X 1.9" (L x W x H ) Use small thread to bundle the moss on the product constitute a nature living environment.