Porpoise's PU/Hard Resin backgrounds are designed for use in terrariums because they are scratch-proof. The thin top layer is made of Hard Resin, making it indestructable to reptile's sharp claws, while the lower PU layer makes it lightweight and easy to handle. PU/Hard Resin backgrounds are 2 cm thick. We welcome custom dimension/shape/design requests. Our designers can work with a photo or an idea that you supply in order to provide you with a unique product.