Description:Our sports running wheel toy does not jam and runs more safely, which prevents hamsters from pinching their feet during exercise. It is stable and anti-rollover, allowing small animals to play with confidence.Not only can the sport wheels toy help small animal to exercise, consume part of their physical strength, help them maintain a good body shape, but also play a role in relieve stress and boredom. It is constructed of ABS material.This product diameter is 13cm.It is suitable for hamster, guinea-pig, hedgehog, squirrel, chipmunk, golden bear rat and other small animals.Item Name: Hamster ToyMaterial: ABSFeatures: Bite Resistant, Eco-friendly, Double BearingsExtend Holes: 5.5-7cmSize Details:Diameter: 13cm/5.12" (Approx.)Notes: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.Package Includes:1 x Hamster Toy