... ball bearing,cosmetic package,industrial ,track ball,and so on hollow ballsize:10mm--100mmPP,POM,PA(NYLON),PC ... ,ABS,PE,HDPE and so on Usage:floating ball,valve ball,sewage ball,cosmetic ... package,industrial ,track ball,and so on plastic roll on bottle 50ml,75ml PP,HDPE,PE cosmetic package ... such as PP,PE, POM, PA,PMMA and so on. The tolerance can be 0.01mm with good surface ...