... solid ballsize:3.5mm--55mmPP,POM,PA(NYLON),PC,ABS,PE,HDPE and so onUsage:for ball bearing,cosmetic package,industrial ,track ... hollow ballsize:9.5mm--100mmPP,POM,PA(NYLON),PC,ABS,PE,HDPE and so on Usage:floating ball,valve ball,sewage ball ... on bottle 30ml,40ml,50ml,60ml,75ml,120ml,180ml PP,HDPE,PE cosmetic packagemedical package glass roll on bottle25ml,30ml,45ml,50ml ...