Niteangel Natural Wooden Rock Climbing Ladder, Wooden Climbing Wall for Dwarf Hamster Mouse and Other Small Animals Made from pet safe wood (with a little non-toxic glue). The ladder is ideal for your pet to climb and play on for hours of entertainment. Relieves boredom and increases activity level. Ideal for hamsters, gerbils, mouse and other small animals. This Wooden Ladder measures 6" in width, 9" in height and 1/2" in depth.