Heat welding quality zorb ramp, water rollers with custom design, fast delivery,competitive price Certified blower & material Specifications for quality zorb balls,grass walking balls,water balls,water walking balls,water rollers:(1) Size(dia.): 16L x 5.0W x 6.5H ,or as per custom size;(2) Material: polyether TPU 0.8mm,or PVC 1.0mm,or as per customized;(3) Stitching and customized design ...