... HDPE and so on Usage:floating ball,valve ball,sewage ball,cosmetic package,industrial ,track ball,and so on plastic roll on bottle 50ml,75ml ... made of different materials, such as PP,PE, POM, PA,PMMA and so on. The tolerance can be 0. ... 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 ...