The CritterTrail Snap-on Comfort Wheel is silent and has a solid running surface with smooth threads that allow for adequate grip. The wheel attaches to the outside of the Critter Trail cage for your critter to enjoy. The 6.75" dia wheel is perfectly sized for hamsters, mice and gerbils. The wheel can also be attached directly to CritterTrail Fun-nel Tubes for added adventure and exercise fun.
