... Product nameSpecificationMaterialApplicationSolid ball4mm-55mmPP,PE,ABS,POM,PA,PMMATrackball,Ball valve,Bearing ball, Roll on ball,and so onHollow ball9.5mm ... -100mmPP,PE,HDPERoll on ball,Bearing ball,Ball valve,Floating ball,and so onRoll on ball and holder8mm, 10mm ... ,40ml,50ml,60ml,75ml,120mlPPCosmetic packaging plastic roll on balls with holder for deodorant perfume lipstic