... ,POM,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,25 ... on bottle6ml,30ml,40ml,50ml,60ml,75ml,120mlPPCosmetic packaging Nylon Balls