Kaytee Critter Cruiser for Hamsters and Gerbils is an exciting pet powered exercise car for hamsters and gerbils. Critter Cruisers adjustable racing wheel allows for the car to work in different ways First when the Comfort Wheel is in the top position exercising critters spin the Wheel and the Critter Cruiser remains stationary. Interactive fun begins by adjusting the Comfort Wheel into the middle position. In the middle position you can watch your pet turn the wheel and roll their Critter Cruiser on any flat surface. Exciting pet powered exercise car for hamsters and gerbils Makes a great temporary holding area to keep your furry friend while you clean their home Adjustable racing wheel Critter Cruiser Dimensions 12 Inch L x 6 Inch W x 9 Inch H Assorted colors let us pick a color for you