... --100mmPP,POM,PA(NYLON),PC,ABS,PE,HDPE and so on Usage:floating ball,valve ball,sewage ball,cosmetic package,industrial ,track ... ,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 ...