Bucatstate Super-silent Dual-Bearing Hamster Exercise WheelSize：6.7 inches/5.5 inchesEquipped with accessories can be mounted on the iron wire cagesuitable for small animals such as dwarf hamsters Syrian hamsters gerbils etc.Features：Super silentIntegrated Runway DesignComfortable foot feelPerfect cage decorationBucatstate has been specializing in small pet cages and accessories for years.Please feel free to contact us if you got any problem.Support no reason to return within 30 days.