inflatable grass walking ball 1.Custom design and color 2.Heat welding 3.Certificated material & pump 4.Competitive prices Specifications for quality zorb balls, grass walking balls,water balls,water walking balls,water rollers:(1) Size(dia.): Dia.:1.9~3.5m, or as per custom size;(2) Material: polyether TPU 0.8mm,or PVC 1.0mm,or as per customized;(3) Hot welding and customized design available;(4 ...