... specificationmaterialapplication solid ballsize:1mm--60mmPP,POM,PA(NYLON),PC,ABS,PE,HDPE and so onUsage:for ball bearing ... on hollow ballsize:10mm--100mmPP,POM,PA(NYLON),PC,ABS,PE,HDPE and so on Usage:floating ball ... on plastic roll on bottle 50ml,75ml PP,HDPE,PE cosmetic package glass roll on bottle10ml,25ml, ... balls are made of different materials, such as PP,PE, POM, PA,PMMA and so on. The tolerance ...