The external buckle of this hamster cage is made of plastic, which is strong and durable. Its small hole design can better ventilate the , and you can use it indoors or outdoors. And suitable for hamsters, squirrels, hedgehogs, guinea pigs and other small pets. Features - Color: Random color - Material: Plastic - Size: 6.00X6.00X4.50cm;/2.36X2.36X1.77in; - Tailor-made toy accessories, plastic material, quality, sturdy, not easy to be knocked by naughty hamsters. - It can be used . The small hole design of the interface can better prevent the baby hamster from hypoxia in the . - Expand your habitat and provide more space for pets. There are many colors to choose from. - The hamster accessory is place for curious creatures who wish to explore and promote exercise and develop healthy habits. - It can be used outdoors, which can better protect your hamster from running out of the to run . Package list: 3 x hamster tube plugs