CNC machine ballscrew support unit 1.kinds of types:EF,EK,BK,BF,FK,FF... 2.good quality,competitive price 3.rich stock ... CNC machine ballscrew support unitKinds of types:EF,EK,BK,BF ... smoothly without deflection.2.High quality material and leading technology.3.Prompt delivery and good service.4.Models:EF,EK,BK ...