... 0mm;;(3) Customized design available and preferred;(4) Extensive placed in parks,grass garden,pools,playing centers,and some other relaxation ... use any more, that means, the whole product can't use any more. The new water roller ball is not inflatable, it hasn ... . The new roller ball has two plastic(PE) wheel, connected by the stainless steel bearing, which is never broken, and the transparent material ...