Made of plastic material, no harm, no odor, safe for pet use. Bite-resistance, sturdy design achieves a reliable standing and support when running or walking, durable to use. Not easy to break or deform, long serving life. A fun exercise wheel for small pet, like hamster, rat, mice, etc. Features -Color:Sky-blue -Material: Plastic - Safe wheel for pet's toes and tails, super mute, hamsters play at night, does not affect the owner's sleep. - Small size for small hamsters, gerbils, or mice and other small pet. - A healthy way to the and stress of your small pets, them from chewing their cages or other furniture. - Keep them healthy and active, and help them with their environment in an entertaining way. - Great pet gift, give them a little surprise, show them your love, and provide endless fun and joy for small pet. Package list: 2 x Hamster Exercise Wheel