3/16'' bearing ball 1) material: POM ,PP,PA,PMMA,ABS can available 2) mainly used in ball bearing 3) All ... 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 and holder8mm, ... My name is Jane,welcome to chat with me. 1/2" POM Solid Balls