... . Solid ball diameter 1mm--60mm, mainly used in the industry of bearing.2) Plastic balls are made of different materials, such ... nameSpecificationMaterialApplicationSolid ball1mm-60mmPP,PE,ABS,POM,PA,PMMATrackball,Ball valve,Bearing ball, Roll on ball,and so onHollow ball10mm-100mmPP, ... NYLON),PC,ABS,PE,HDPE and so onUsage:for ball bearing,cosmetic package,industrial ,track ball,and so on hollow ...