All natural, kiln dried paulownia wood held together by wire. 21 in X 11.75 in (Length X Width). Flexible and bendable: use as a hideout, tunnel, bridge, or ramp No paints or chemicals in the wood. Completely safe for your pets to chew Trusted and approved by our Own Guinea Pig’s (the featured image models). Suitable for Guinea Pigs, Ferrets, Chinchillas, Dwarf Rabbits, Bunny, Bearded Dragon, Tortoise This flexible bridge by Pulse Brands makes a great bridge, tunnel, or ramp for guinea pigs, chinchillas, dwarf rabbits, ferrets, tortoises, bearded dragons, reptiles, amphibians and other small animals. The wooden sticks are held together by wire and can be bent into shape. Completely safe for your pets to chew. Trusted and approved by our Own Guinea Pig’s (the featured models) Size: 21 in X 11.75 in (length X width)