【Environmentally friendly material】 All finishes are non-toxic, safe and environmentally friendly.All parts are rounded and smooth, avoiding hurting your little creature. br /> 【& Eacute; avoid noise】 Quiet, super mute racing sport wheel, hamsters play at night, does not affect owner’s sleep. 【Fun Play】 This is a great roller for your pet hamster to exercise or have fun when you are outside, let your pet hamster have fun and exercise! 【Safe for your pet company】 Anti-rape design, hamster safe. Exercise and have fun. gnaw your hamster. 【Suitable for small animals】 Nice pet toy for hamsters, chinchillas, guinea pigs and other small animals.