FEATURE: .MATERIAL IS STAINLESSSTEEL.IT HAS MORE BALANCE ,IT COULD ROTATE LONG TIME .USE THE PROFESSINAL CERAMIC ZIRCONIA BEARING.YOU DO NOT NEED MORE ANY MAINTAIN, DO NOT NEED TO ADD LUBRICATING OIL..WASH BY WATER DIRECTLY .EASY WAY TO CLEAR YOUR BABYPACKAGE INCLUDE:1 X TRI-SPINNER FIDGET TOY