... 10000pcs/box The production per day for the size ball 20mm is :250,000pcs product name specificationmaterialapplication solid ... HDPE and so on Usage:floating ball,valve ball,sewage ball,cosmetic package,industrial ,track ball,and so on plastic roll on ... 29mm,35.2mm--35.56mmplastic ball+pe houldercosmetic package china plastics hollow ball for mining industry,water cover floating without grinding