... of ball screwBrand name Taiwan COMTOP ModleSFU,DFU,SFI,DFI,SFS,DFS,SFE,SFK,BSH seriesDiamater Diamater:6mm-100mmPitchPitch:1mm-50mmGradeC3 ... ball screw Taiwan COMTOP SFI series ball screw Taiwan COMTOP SFS series ball screw Taiwan COMTOP SFK series ball screw Taiwan ...