Dog toy -hamster ball accessory ball for rodent Highlights generic brand hamster ball accessory ball for rodent Made of transparent acrylic; The bearing is of good mute effect and durable in service life. Can be free standing or attached to the wire cage easily and firmly. Whole body washable, increase pet extract frequency to keep healthy. The aerodynamic design reduces wind resistance, allowing the wheels to spin smoother. Easy to install, suitable for hamsters, mice, gerbils, or other small animals. Specification: 13cm Height: Thickness: 7.2cm / 2.83inch; Runner Diameter: 13cm/5.12inch 17cm Height: Thickness: 7.2cm/2.83inch; Runner Diameter: 17cm/6.69inch 20cm Height: Thickness: 9cm/3.54inch; Runner diameter: 20cm / 7.87inch Package includes: 1 piece Hamster exercise toy (without stand) Note: The product without stand. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.