This is our small Montipora measuring 8x7x4.5 inches high. These are made of a durable, flexible and nearly unbreakable UV stable polyurethane composite safe for all aquariums. Many colors to choose from. Pictured here is the standard pumpkin color. All of the neon color options will glow under black light and actinic led lights!! 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