3/16'' bearing ball 1) material: POM ,PP,PA,PMMA,ABS can available 2) mainly used in ... , performance, safety and reliability. Product nameSpecificationMaterialApplicationSolid 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 ...