... can do all kinds size of ball and roll on bottle product name specificationmaterialapplication solid ballsize: ... 1mm--60mmPP,POM,PA(NYLON),PC,ABS,PE,HDPE and so onUsage:for ball ... on hollow ballsize:10mm--100mmPP,POM,PA(NYLON),PC,ABS,PE,HDPE and so on Usage: ... 4mm,29mm,35.2mm,35.56mmPE,PPCosmetic packagingGlass roll on bottle10ml,25ml,30ml,40ml,45ml,50ml,75ml ...