Material : Metal .That is very nice in dark for the Lumious function . The best materal and quality , With 3 bearings , more funny to play . Self -owned brand and with patent , very popular and hot in Market .Products Size :19*26*8 CM , Carton Size :76*36*81CM .N.W :12 KG , G.W. :15 Kg .Psc in Carton :96 pcs .