... .2) Plastic balls are made of different materials, such as PP,PE, POM, PA,PMMA and so on. The tolerance can be ... area.4) Honest And Trustworthy Enterprise.Product nameSpecificationMaterialApplicationSolid ball1mm-60mmPP,PE,ABS,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 ...