water walking ball: 1,PVC or TPU 2,Dia2m or other sizes 3,Germany ... , ball.Specicifications:1, material: 0.8,1.0mm PVC; and 0.7,0.8,1.0mm Polyester TPU2, sizes: 1.5,1.8,2.0 ... needs about 30-60seconds to fill a ball till full with a blower, 1-2persons capacity