3/16'' bearing ball 1) material: POM ,PP,PA,PMMA,ABS can available 2) mainly ... and reliability. Product nameSpecificationMaterialApplicationSolid ball3.5mm-55mmPP,PE,ABS,POM,PA,PMMATrackball,Ball valve,Bearing ball, Roll on ball,and ... ball and holder8mm, 10mm,19.05mm,25.2mm,25.4mm,29mm,35.2mm,35.56mmPE,PPCosmetic packagingGlass roll on bottle10ml, ... Jane,welcome to chat with me. 1/2" POM Solid Balls