The pet attic is made of wood, and it is natural and eco-friendly. The pet attic is waterproof and easy to clean. The pet attic is designed with smooth and mellow surface, and it will not scratch your hamster. Features: High quality: made of wood, safe and non-toxic, natural and eco-friendly. DIY design: easy to install the wooden attic, convenient to use. Smooth surface: designed with the smooth and mellow surface, not scratch your hamster. Cute and fashionable attic, and your pet will like it. Waterproof: the pet attic is waterproof and easy to clean. Specifications: Condition: 100% Brand New Material: Wood Color: Pink, Blue, Green(Optional) Assembling Size: approx. 10.5*7*13.6cm/ 4.13* 2.75* 5.35in Weight: approx. 86g/ 3.03oz Package List: 1* Wooden Attic A Set of Installation Accessory Note: 1. Please allow 0-2cm error due to the manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.