... ,PE,HDPE and so onUsage:for ball bearing,cosmetic package,industrial ,track ball,and so on hollow ballsize:10mm-- ... ,PA,PMMATrackball,Ball valve,Bearing ball, Roll on ball,and so onHollow ball10mm-100mmPP,PE,HDPERoll on ball,Bearing ball,Ball valve,Floating ball,and so ... onRoll on ball and holder8mm, 10mm,19.05mm, ...