... PA,PMMA,ABS can available 2) mainly used in ball bearing 3) All colors can available Shangyu Hongda Plastics Industry Co ... ball3.5mm-55mmPP,PE,ABS,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 ... Jane,welcome to chat with me. 1/2" POM Solid Balls