... PP,PE, POM, PA,PMMA and so on. The tolerance can be 0.01mm with good surface and precision.3) Our products are mainly ... sold to European and American area.4 ... onHollow ball10mm-100mmPP,PE,HDPERoll on ball,Bearing ball,Ball valve,Floating ball,and so onRoll on ball and holder8mm, 10mm,19.05mm,25 ...