... 10mm,25.2mm,28.8mm,35.2mm ◊ roll on ball and holder for deodorant and perfume◊ Widely used in cosmetics ... 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,19.05mm,25. ...