This is our Smaller version of the Acropora Gemmifera measuring 6.5x5.5x5 inches. These are made of a durable, flexible and nearly unbreakable UV stable polyurethane composite safe for all aquariums. Many colors to choose from. If you would like it in a different color not listed, just call us and well make it no problem. Thank You and enjoy the finest artificial corals ! Call or email us anytime with any questions at 1-888-637-6598 or oceanaquaria@gmail.com